Answer:
The simplified expression is -4x and the value is -516
Step-by-step explanation:
−12x+14x−6x
Combine like terms
2x-6x
-4x
Let x =129
-4*129
-516
A toy rocket launched into the air has a height (h feet) at any given time (t seconds) as h=- 16t^2 + 160t until it hits the ground. At what time(s)is it at a height of 9 feet above the ground?
8. What is the maximum number of
right angles a triangle can have?
Answer:
1
Step-by-step explanation:
180 = 90 + 90 (F)
you must have 3 angles
Answer:
One.
Step-by-step explanation:
A triangle can only have one right angle because all three angles of a triangle MUST add up to be 180 degrees. That means if there are two right angles then the answer would automatically be over 180.
Example:
90+90+1=181
Therefore, a triangle can only have one right angle
If r = 4 and ^a8 = 100, what is the first term of the geometric
sequence?
The first term of the geometric sequence is 0.0061
Step-by-step explanation:
The general form of geometric sequence is a, ar, ar²,ar³,.......
where,
a is the first term of the sequence.r is the common ratio. Here, the common ratio r = 4.The 8th term of the sequence is 100. Hence n = 8.The formula to find the nth term of the geometric sequence is given by :
⇒ [tex]n_{th} term = ar^{n-1}[/tex]
⇒ [tex]8_{th}term = a\times4^{8-1}[/tex]
⇒ [tex]100 = a \times 4^{7}[/tex]
⇒ [tex]100 = a \times 16384[/tex]
⇒ [tex]a = \frac{100}{16384}[/tex]
⇒ a = 0.0061
Therefore, the first term of the geometric sequence is 0.0061
Answer:
The first term of the geometric sequence is 0.0061
John and Sarah are each saving money for a car. The total amount of money John will save is given by the function j(x)= x^2 +2x, where x represents the number of weeks. The total amount of money Sarah will save is given by the function s(x)= -3x+6, where x represents the numbers of weeks.
Explain the point of intersection in context to the problem. Show all work
Answer:
See below.
Step-by-step explanation:
Where the graphs of the functions intersect it represents the number of weeks when they have both saved the same amount of money. So by solving the system we can find the number of weeks and that amount of money.
y = x^2 + 2x
y = -3x + 6 so
x^2 + 2x = -3x + 6
x^2 + 5x - 6 = 0
(x + 6)(x - 1) = 0
So x = 1 ( we ignore the negative)
So after 1 week they have saved the same amount and the amount is -3 + 6 = 3.
Are you sure that -3x + 6 is right - because Sarah does not save anything after year 1 . The equation has a negative slope!!
Which sphere has a volume of approximately 113.1 cubic inches?
A.Glass ball: r = 3 inches
B.Soccer ball: r = 4 inches
C.Lamp: d = 10 inches
Answer:
it's a glass ball r = 3 inches
Step-by-step explanation:
edgenutiy
Answer:
glass ball 3 inches ( ; ( :
Step-by-step explanation:
Which sphere has a volume of approximately 113.1 cubic inches?
Glass ball: r = 3 inches
A glass ball.
Soccer ball: r = 4 inches
A soccer ball.
Lamp: d = 10 inches
A round lamp.
Find the rule of f(2)
Answer:
f(2) = 25
Step-by-step explanation:
Given
f(x) = [tex](5)^{x}[/tex]
To evaluate f(2) substitute x = 2 into f(x)
f(2) = [tex](5)^{2}[/tex] = 25
A new statue with a circular base is being unveiled in a downtown park. The statue's base has a radius of 15 feet. What is the area of the base? Round your answer to the nearest whole number. Use 3.14 for π.
The area of the circular base is 707 square feet, calculated using the formula A = πr², where π is 3.14 and the radius is 15 feet.
Explanation:The question asks for the area of a circular base of a statue with a given radius. This is a question of geometry, and the formula for the area of a circle is A = πr², where A represents the area and r represents the radius. In this case, the radius given is 15 feet.
To calculate the area, we insert the value of the radius into the formula, so it becomes A = π(15)². Since we are asked to use 3.14 for π, the calculation becomes: A = 3.14 * 15², which equals 706.5 square feet.
However, since we have been asked to round to the nearest whole number, the final answer would be 707 square feet.
To find the area of the circular base of the statue, we can use the formula A = πr^2, where A is the area and r is the radius. In this case, the radius is given as 15 feet. Plugging this value into the formula, we get:
A = 3.14 * 15^2 = 3.14 * 225 = 706.5 square feet
Rounding to the nearest whole number, the area of the base is approximately 707 square feet.
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Does coordinate x or coordinate y represent a greater number?
Answer:
It depends
Step-by-step explanation:
There is no problem attached and it depends on the problem.
Answer:
MOSKAUStep-by-step explanation:
There are 870 boys and 800 girls in a school.
The probability that a boy chosen at random studies Spanish is 2/3
The probability that a girl chosen at random studies Spanish is 3/5
a) Work out the number of students in the school who study Spanish.
b) What is the probability, as a fraction in its simplest form, that a student
chosen at random from the whole school does not study Spanish?
Answer: a) 1060, b) [tex]\dfrac{61}{167}[/tex]
Step-by-step explanation:
Since we have given that
Number of boys = 870
Number of girls = 800
Probability that a boy chosen studies Spanish = [tex]\dfrac{2}{3}[/tex]
Probability that a girl chosen studies Spanish = [tex]\dfrac{3}{5}[/tex]
So, the number of boys in the school who study Spanish would be
[tex]\dfrac{2}{3}\times 870=290\times 2=580[/tex]
So, the number of girls in the school who study Spanish would be
[tex]\dfrac{3}{5}\times 800\\\\=3\times 160\\\\=480[/tex]
So, total number of students who study Spanish would be :
[tex]480+580=1060[/tex]
b) What is the probability, as a fraction in its simplest form, that a student
chosen at random from the whole school does not study Spanish?
Number of students who do not study Spanish would be:
[tex](870+800)-1060\\\\=1670-1060\\\\=610[/tex]
So, the probability of students who does not study Spanish would be :
[tex]\dfrac{610}{1670}=\dfrac{61}{167}[/tex]
Hence, a) 1060, b) [tex]\dfrac{61}{167}[/tex]
There are 1060 students who study Spanish in the school. The probability that a student chosen at random from the whole school does not study Spanish is 610/1670.
Explanation:To work out the number of students in the school who study Spanish, we need to find the number of boys and girls who study Spanish and add them together. The probability that a boy chosen at random studies Spanish is 2/3. So the number of boys who study Spanish is 870 * (2/3) = 580. The probability that a girl chosen at random studies Spanish is 3/5. So the number of girls who study Spanish is 800 * (3/5) = 480. Therefore, the total number of students who study Spanish is 580 + 480 = 1060.
To find the probability that a student chosen at random from the whole school does not study Spanish, we subtract the probability that a student does study Spanish from 1. The probability that a student does study Spanish is 1060 (students who study Spanish) divided by 1670 (total number of students in the school). Therefore, the probability that a student does not study Spanish is 1 - (1060/1670) = 610/1670, which is already in its simplest form.
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A person invested $690 in an account growing at a rate allowing the money to double
every 7 years. How much money would be in the account after 3 years, to the nearest
dollar?
The amount of money in the account after 3 years would be $828.
Explanation:To determine the amount of money in the account after 3 years, we need to find the number of times the money doubles in a period of 3 years, given that it doubles every 7 years. To find this, we divide 3 by 7 to get the number of doubling periods which is approximately 0.4286. Since the money doubles every 7 years, we multiply the initial investment of $690 by 2 raised to the power of 0.4286 to find the final amount.
Using the formula A = P(1+r)^n, where A is the final amount, P is the initial investment, r is the interest rate per period, and n is the number of periods, we have P = $690, r = 100% (as the money doubles), and n = 0.4286. Substituting these values into the formula, we get A ≈ $827.84. Hence, the amount of money in the account after 3 years, to the nearest dollar, would be $828.
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Final answer:
To calculate the future value of an investment that doubles every 7 years after 3 years, we use the exponential growth formula with an annual interest rate determined by the Rule of 70, resulting in approximately $918.
Explanation:
To determine how much money will be in the account after 3 years given that the amount doubles every 7 years, we can use the formula for exponential growth. The formula is A = P(1 + r/n)nt, where A is the amount of money accumulated after n years, including interest, P is the principal amount (the initial amount of money), r is the annual interest rate (as a decimal), n is the number of times that interest is compounded per year, and t is the time the money is invested for in years.
Since the money doubles every 7 years, the effective annual interest rate 'r' that would cause this can be found using the Rule of 70. The Rule of 70 states that to find the number of years required to double the money at a given interest rate, you divide 70 by the annual interest rate. Here, we have that number already (7 years), so we can rearrange to find the interest rate: rate = 70 / time to double. Therefore, the interest rate is 70 / 7, which equals 10% or 0.10 as a decimal.
However, we are looking for the amount after 3 years, not 7. Thus, we need to adjust our formula to account for this shorter time period:
A = P(1 + r)^t
A = 690(1 + 0.10)^3
A = 690(1.331)
A ≈ $918
So, after 3 years, the investment would grow to approximately $918, to the nearest dollar.
How many solutions are there to the equation below?
13x + 195 = 13(x+15)
O
A. 1
OB. o
c. infinitely many
The senior class had 100 T-shirts to sell to raise money. They sold 52 T-shirts at $7.75 each. Then they sold the rest for $9.25 each. How much money did they collect overall?
$775.00
$847.00
$925.00
$853.00
Answer:
$847.00
Step-by-step explanation:
First you multiply 52 by $7.75
This gives you $403
Then you subtract 52 from 100 to find the remainder of shirts
This gives you 48
So then you multiply 48 by $9.25
This gives you $444
Then you add $444 and $403 giving you $847.00
Answer:
The answer is B: 847
Step-by-step explanation:
52 x 7.75 = 403
100 - 52 = 48
48 x 9.25 = 444
444 + 403 = 847
Consider the quadratic function fx=x2-8x-4. What is the value of the leading coefficient
Answer:
1
Step-by-step explanation:
Given
f(x) = x² - 8x - 4
The leading term in the expression is x²
with a coefficient of 1 ← leading coefficient
The leading coefficient of a quadratic function of equation fx=x2-8x-4 is 1.
The leading coefficient of a quadratic function is the coefficient of the x² term. In the quadratic function f(x) = x² - 8x - 4, the leading coefficient is 1 because the coefficient of x² is always assumed to be 1 when not explicitly shown.
Taylor is thinking of a three-dimensional object.
All interior angles are right angles.
The object has 8 vertices.
Only 4 of the object's 6 faces are congruent.
Which figure best describes the object that Taylor is thinking of?
A.
cube
B.
rectangular prism
C.
triangular prism
D.
square pyramid
NEED HELPP
Answer:
B
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
A water sprinkler sends water out in a circular pattern. How many feet away from the sprinkler can it spread water if the area formed by the watering pattern is 1,808.64 square feet? Use 3.14 for pi.
Answer:
The sprinkler can spread water in a radius of 24 feet.
Step-by-step explanation:
Since the sprinkler sends water in a circular pattern in order to find the distance at which it can spread the water we need to find the radius of the circle. The area of the circle is said to be 1808.64 and it's formula is given by:
area = pi*r²
1808.64 = 3.14*r²
r² = 1808.64/3.14 = 576
r = sqrt(576) = 24 feet
The sprinkler can spread water in a radius of 24 feet.
The Lumberjack Hardware store found that 5 out of every 10 paint sprayers they recently received were not properly assembled. If they received 385 paint sprayers, about how many paint sprayers can they expect to be faulty?
Answer: 193 faulty paint sprayers
Step-by-step explanation: 5/10 is = to 1/2 so half of them are faulty
next divide 365 by 2 to get 192.5 remember if the decimal is 5 or greater you can round up since you cannot have half a paint sprayer you have to round up to 193 paint sprayers
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Which of the following are square roots of the number below? Check all that
apply.
64
A. -8
B. 64 1/2
C. 32
D. -(64) 1/2
Answer:
A
Step-by-step explanation:
Just square all of them to find 64
The square roots of 64 are -8 and 8. Neither 32 nor 64 1/2 are square roots of 64.
Explanation:The square root of a number is a value that, when multiplied by itself, gives the original number. When dealing with real numbers, remember that a number can have two square roots: a positive root and a negative root.
For the number 64, we know 8 * 8 equals 64, so 8 is a square root. As a negative number multiplied by a negative number results in a positive number, -8 * -8 also equals 64. Therefore -8 is also a square root of 64.
Option A, -8, and B, '(64) 1/2' or -8, are correct. The square root of 64 is not 32 and 64 1/2.
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The cost to enter a waterpark increases from $56 per person to $73 per person. What percent of the entry fee increase
Final answer:
The percent increase of the waterpark's entry fee is approximately 30.36%, which is calculated by finding the difference between the new and original cost, dividing by the original cost, and then converting that number to a percentage.
Explanation:
To calculate the percent increase of the entry fee to the waterpark, we need to follow these steps:
Find the amount of the increase by subtracting the original cost from the new cost.Divide the amount of the increase by the original cost.Multiply the result by 100 to convert it to a percentage.Step 1: The increase in cost is $73 - $56 = $17 per person.
Step 2: The increase divided by the original cost is $17 ÷ $56 ≈ 0.30357.
Step 3: To find the percent increase, we multiply the result from step 2 by 100: 0.30357 × 100 ≈ 30.36%.
Therefore, the percent increase of the entry fee is approximately 30.36%.
To find the percent increase in the entry fee, subtract the old fee from the new fee, divide by the old fee, and multiply by 100. The entry fee increase is approximately 30.36%.
Explanation:To find the percent increase in the entry fee, you need to calculate the difference between the new fee and the old fee, and then divide that difference by the old fee. Finally, multiply the result by 100 to get the percentage.
Find the difference in the fees: $73 - $56 = $17Divide the difference by the old fee: $17 ÷ $56 ≈ 0.3036Multiply the result by 100 to get the percentage: 0.3036 × 100 ≈ 30.36%The entry fee increase is approximately 30.36%.
the fish Casey caught are listed below.
8 8 12 11 10 8 10 9
Casey catches one more fish that is 13 inches long. Which measure will remain the same when the 13-inch fish is included in the list of fish lengths?
(Highlight the correct answer)
Mean
Median
Mode
Range
It costs $8.50 to park a vehicle at the Wild Rapids Water Park. The admission price to the park is $27.50 per person. If a group in one vehicle spends $228.50 to park and enter the park, how many people attended? Write an equation, and then solve.
Answer:
8 people
Step-by-step explanation:
step1:move 8.50 to the other side
228.50=8.50+27.50x
220=27.50x
step 2:find x by dividing
220=27.50x
x=8
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There are 8 people who attended the park.
To solve the problem, let's define the variables and write an equation. Let x be the number of people who attended. The total cost is the sum of the parking fee plus the admission fees.
The parking fee is $8.50, and the admission fee per person is $27.50. Therefore, the total cost can be expressed as:
Total Cost = Parking Fee + (Admission Fee per Person * Number of People)
This simplifies to:
$228.50 = $8.50 + $27.50 * x
First, subtract the parking fee from the total cost:
$228.50 - $8.50 = $27.50 * x
$220 = $27.50 * x
Now, divide both sides by the admission fee per person to find x:
x = $220 / $27.50
x = 8
Thus, 8 people attended the park.
You roll a 6-sided die two times. What is the
probability of rolling a 6 the first time and 2
the second time?
*write your answer as a fraction
Answer:
First time : 1/6
Second time : 1/6
Step-by-step explanation:
Answer:
1/6
Step-by-step explanation:
Since it is a six-sided die, you will roll every number at least one time, making the answer 1/6
40.40
What is the area of the base of the cone below? Round the answer to the nearest tenth if necessary.
V = 52 in 3
14.7 in2
Please hurry 29 points
17.3 in2
18 5 in 2
19.5in 2
Answer:
D) 19.5 in^2
Step-by-step explanation:
Volume is 1/3base * height
52in^3 = 1/3x*8
multiply by 3
156in^3 = x*8
divide by 8
19.5 = x
x = 19.5
Answer:
D
Step-by-step explanation:
Look at the following graph of the given equation. Determine whether the equation is a function. Explain why or why not.
y = 2 x + 2
On a coordinate plane, points are at (negative 1, 0), (0, 2), (1, 4), (2, 6).
Answer:
Yes this is a function
Step-by-step explanation:
y = 2x + 2
0 = 2(-1) + 2
0 = -2 + 2
0 = 0
Yes
2 = 2(0) + 2
2 = 0 + 2
2 = 2
Yes
4 = 2(1) + 2
4 = 2 + 2
4 = 4
Yes
6 = 2(2) + 2
6 = 4 + 2
6 = 6
Yes
The equation y = 2x + 2 is a function, because each 'x' value corresponds to a single 'y' value, as per the mathematical definition of a function.
The graph of the equation y = 2x + 2 does indeed represent a function. In mathematics, a function is defined as a relation in which each input (or 'x' value) corresponds to exactly one output (or 'y' value). In the given coordinate pairs, you will notice that each individual 'x' value (such as -1, 0, 1, and 2) corresponds to a single 'y' value. Furthermore, the equation itself, y = 2x + 2, will always yield a single 'y' value for each 'x' value you substitute into it. This aligns with the definition of a function. Hence, the equation y = 2x + 2 is a function.
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In a survey, 15 high school students said they could drive
and 15 said they could not. Out of 60 college students
surveyed, 30 said they could drive. Micah concluded that
knowing that a person is in college means they are more
likely to drive. Is Micah's conclusion correct?
Answer:
No
Step-by-step explanation:
this is because only 50% of the college students said they could drive there fore it doesn't make sense.
Answer:No, Micah is not correct. Since there are equal numbers in the group that drive and the group that doesn’t drive, the relative frequency for each is 50%. Because the relative frequencies are the same, there is no association between the variables.
Step-by-step explanation: its on e2020
Find the inner product for 5,2 multiply -3,7 and state whether the vectors are perpendicular.
Answer:
-1 ; no
Step-by-step explanation:
5 x -3 + 2 x 7 = -1
And since -1 is not zero the vector will not be perpendicular
Answer:
C on edge
Step-by-step explanation:
Which is the best description of the graph of the function f(x)=60(1/3)^x?
Answer:
what do you mean the best description?
Step-by-step explanation:
Answer:
: the graph has an initial value of 60, and each successive term is determined by multiplying by 1/3
Step-by-step explanation:
f(xequal 6 [1/nitial value x=0, f(x) = 60*[1/3]^0 = 60*1 = 60x=1 ⇒f(1) = 60*[1/3]x=2 f(2) = 60*[1/3]^2 = f(1) * [1/3]x = n f(n) = 60*[1/3]^n=60*[1/3]^(n-1)*[1/3] = f(n-1)*[1/3]
what is -2(x-5)-4=-22 ??
Answer:
x = 14
Step-by-step explanation:
-2(x-5)-4=-22
Distribute
-2x +10 -4 = -22
Combine like terms
-2x+6 =-22
Subtract 6 from each side
-2x+6-6 = -22-6
-2x = -28
Divide each side by -2
-2x/-2 = -28/-2
x = 14
can someone help me with this equation plsss i really need it
3(6x–5)–7(3x+10)=0
Answer:
-28 1/3
Step-by-step explanation:
The graph of f(x) = (0.5)x is replaced by the graph of g(x) = (0.5)x − k. If g(x) is obtained by shifting f(x) down by 5 units, then what is the value of k?
Step-by-step explanation:
k is the variable for the translations on the Y-axis so if u move the graph 5 units down then k would be 5
Answer:
k=5
Step-by-step explanation:
A carpenter finds that the measure of an angle formed between a vaulted ceiling and one wall is 67°. How many degrees is the supplement of this angle?
Answer:
113 degrees
Step-by-step explanation:
To find the supplement angle, subtract 67 degrees from 180 degrees
180 - 67 = 113 degrees
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