Answer:
3.4 seconds
Step-by-step explanation:
First, you have to change 20mph to feet per seconds. To do this, multiply mphs by 1.4667. When you multiply 20mph by 1.4667, you get 29.3333 fps.
Divide 100 by 29.333 to get 3.40909478 (3.4) seconds
Answer:
3.41 sec
Step-by-step explanation:
We need to use the formula: [tex]d=rt[/tex] , where r is the rate of the object, t is the time, and d is the distance.
Here, we know that the distance is 100 ft and that the rate is 20 mph. However, let's change the distance to miles because the rate is in miles.
There are 5280 ft in 1 mile, so:
5280/1 = 100/x ⇒ x = 100/5280
Then, d = 100/5280 miles and r = 20. Plug these in to find t:
100/5280 = 20t
t = (100/5280) / 20 hours
Now, we need to convert hours to seconds. There are 3600 seconds in 1 hour, so multiply our current t by 3600:
t = [(100/5280) / 20] * 3600 ≈ 3.41 sec
Hope this helps!
A camp needs 100 students to help with the 4-year old campers. Eight students from 4 different classes have agreed to help. How many more students are needed? Show your work.
Answer: if i can get brainliest that would be great
x = Students
100=8(4)+x
Equation:
100=32+x
-32 -32
68=x
68 students are needed
Answer:
the answer is 92
Step-by-step explanation:
You have to subtract 8 students that signed up from the amount of students needed.
What do changes in a graphs slopes on a distance-versus-time graph mean?
Answer:quadratic formula
simple method
Write 0.06 as a fraction.
Answer: 3/50
Step-by-step explanation: I'm Smart, just trust me.
Answer:
3/50
Step-by-step explanation:
Since in the number 0.06 the 6, is in the 100's place, the fraction will be over 100.
You have 6/100
You still have to simplify that, divided by 2
3/50
1. I need all these answers
?
Answer: can you show the vocabulary better so I can tell u the anwsers
Step-by-step explanation:
4x-7y=15 and 5x-2y=12
Presumably we're being asked to solve the system.
4x - 7y = 15
5x - 2y = 12
We don't really have any common factors among the coefficients of x, or among the coefficients of y, so we can do the general thing. To eliminate y multiply the first equation by (typically the absolute value of) the coefficient of y in the second equation and vice verse, then add or subtract equations to eliminate.
First equation times 2:
8x - 14y = 30
Second equation times 7:
35x - 14y = 84
Subtract,
27x = 54
x = 54/27 = 2
2y = 5x - 12 = 10 - 12 = -2
y = -1
Answer: x=2, y = -1
Check:
4(2)-7(-1)=8+7=15, good
5(2) -2(-1) = 10 + 2 = 12, good
-----
If you do enough of these 2x2 linear systems you can learn to just write down the answer. I usually remember the matrix inverse, but if you haven't gotten there you can just remember the pattern:
ax + by = c
dx + ey = f
has solutions
x = (ce-bf)/(ae-bd), y = (a f-cd)/(ae-bd)
4x - 7y = 15
5x - 2y = 12
has solutions
denom = ae-bd = 4(-2) - (-7)(5) = 27
x = (15(-2) - (-7)(12))/27 = (-30 + 84)/27 = 2
y = (4(12)-15(5))/27 = (48-75)/27 = -27/27 = -1
Answer:
Step-by-step explanation:
4x-7y=15
Add '-7y' to each side of the equation.
Add '2y' to each side of the equation.
5x + -2y + 2y = 12 + 2y
Combine like terms: -2y + 2y = 0
5x + 0 = 12 + 2y
5x = 12 + 2y
Divide each side by '5'.
x = 2.4 + 0.4y
Simplifying
x = 2.4 + 0.4y
4x + 7y + -7y = 15 + -7y
Combine like terms: 7y + -7y = 0
4x + 0 = 15 + -7y
4x = 15 + -7y
Which is the correct solution for the system?
3y = 6 − 2x
8x = 3y − 1
Answer:
the answer is c
Step-by-step explanation:
just took the test
Answer:
its a
Step-by-step explanation:
i need to know this ASAP 20 points,
Answer: B
Step-by-step explanation:
Solve the equation 1/4 a =3
Answer:
a=12
Step-by-step explanation:
To solve, we need to isolate the variable, a
1/4a =3
To do this, divide both sides by 1/4, or multiply both sides by the reciprocal of 1/4: 4/1
4(1/4a)=3(4)
The 4 and 1/4 will cancel out
a=12
Answer:
a = 12
Step-by-step explanation:
1/4 a = 3
Multiply each side by 4
1/4a*4 = 3*4
a =12
Marsha has two numbers, $a$ and $b$. When she divides $a$ by 70 she gets a remainder of 64. When she divides $b$ by 105 she gets a remainder of 99. What remainder does she get when she divides $a+b$ by 35?
To find the remainder when Marsha divides a+b by 35, substitute the values of a and b into the expression and simplify to find that the remainder is 163.
Explanation:To find the remainder when Marsha divides a + b by 35, we need to consider the individual remainders when a is divided by 70 and b is divided by 105. Since Marsha gets a remainder of 64 when dividing a by 70, we can say that a = 70n + 64, where n is a positive integer. Similarly, since Marsha gets a remainder of 99 when dividing b by 105, we can say that b = 105m + 99, where m is a positive integer.
Now, substitute the values of a and b into the expression a + b and simplify:
a + b = (70n + 64) + (105m + 99) = 70n + 105m + 163
Now, divide a + b by 35 to find the remainder. Since both 70 and 105 are divisible by 35, we can simplify the expression further:
a + b = 35(2n + 3m) + 163
The remainder when dividing a + b by 35 is therefore 163.
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Add:
(–21) + (–37) + (–15)
Question 3 options:
A)
–73
B)
–58
C)
–43
D)
73
Answer:
A
Step-by-step explanation:
Answer:
d
Step-by-step explanation:
evaluate the following numerical expressions
2(5+(3)(2)+4)
2((5+3)(2+4))
2(5+3(2+4))
Follow the instructions below.
(a) Rewrite the decimal in the sentence below as a percentage.
Percent: %
The large tanks made up 0.83 of their sales last quarter.
(b) Rewrite the percentage in the sentence below as a decimal.
Decimal: 0
The kicker made 6.1% of the field goals he attempted during away games.
Answer:
1. 0.83 = 83%
2. 6.1% = 0.061
Step-by-step explanation:
The answer in number one is because when you're trying to find a percentage from a decimal, all you have to do is multiply your decimal by 100, this is because a percentage is always out of 100.
The answer in number two is exactly the opposite, all you have to do is divide by 100 if you are trying to find your decimal from a percentage.
The decimal number 0.83 is equivalent to 83% when expressed as a percentage, and the percentage 6.1% can be written as 0.061 when converted into a decimal.
Explanation:To transform a decimal to a percentage, you need to multiply the decimal by 100. So, the statement 'The large tanks made up 0.83 of their sales last quarter' can be rewritten as 'The large tanks made up 83% of their sales last quarter'.
In order to transform a percentage into a decimal, you divide the percentage by 100. Therefore, the statement 'The kicker attempted 6.1% of the field goals he tried during away games' can be rewritten as 'The kicker attempted 0.061 of the field goals he tried during away games'.
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Which of these numbers is in the solution set of 7x = 56? A. 9 B. 6 C. 7 D. 8
[tex]Answer:x=8[/tex]
Divide both sides by 7
[tex]7x/7=56/7\\x=8[/tex]
what is the nth term for 7,11,15,19
Answer:
[tex]a_{n}[/tex] = 4n + 3
Step-by-step explanation:
Note there is a common difference d between consecutive terms, that is
d = 11 - 7 = 15 - 11 = 19 - 15 = 4
This indicates the sequence is arithmetic with n th term
[tex]a_{n}[/tex] = a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = 7 and d = 4, thus
[tex]a_{n}[/tex] = 7 + 4(n - 1) = 7 + 4n - 4 = 4n + 3
Find the percent change from 71 to 80
Please show your work
Answer:
About 12.68% increase
Step-by-step explanation:
Percent change can be found using:
difference between the values/original value
Difference:
The difference between 71 and 80
80-71=9
Percent Change:
difference/original
The difference is 9, and the original is 71
9/71= 0.12676056338
Convert to a percent by multiplying by 100
0.12676056338*100=12.676056338
Round the nearest hundreth: 12.68
About 12.68% increase
Answer:
12.67 percent
Step-by-step explanation:
To calculate percent change you use the following formula:
[tex]\frac{b - a}{|a|} * 100[/tex]
a = 71 (The first value)
b = 80 (The second value)
Plug the values into the formula.
[tex]\frac{80 - 71}{|71|} * 100[/tex]
[tex]\frac{9}{|71|} * 100[/tex]
[tex]0.1267 * 100[/tex]
[tex]12.67[/tex]
The percent change is 12.67 percent.
Hope this helped! :)
twice a number and the square of a number are 35
Write the equation and the answer
Answer:
equation:
x^2 + x
answer:
5^2 + 7
i think thats right
i am not sure i had a similar question and this was my answer
Step-by-step explanation:
Please please answer this correctly please label the numbers correctly and please write down your answers correctly
Answer:
My explanation -->
Step-by-step explanation:
Go over to the left on the -4 and up 5 times and mark a dot on it.
Next, go up half a mark from 0 and put a dot there.
Then, go over to the left between the -2 and -4 and go up 5 times.
Lastly, from the 0, go down half way until the next horizontal line and place a dot there.
Change the number written in expanded form to a decimal form. 2×1+7(1/10)+4× (1/100)+ 5 x (1/1,000)
Which of the following is the best estimate for the direction of the given vector?
a.
60° N of E
c.
60° W of S
b.
60° E of N
d.
60° S of W
Please select the best answer from the choices provided
A
B
C
D
Answer:
The answer is B
Step-by-step explanation:
The answer is B on edg2020. Hope this helps. #classof2020
Answer:
The answer is B
Step-by-step explanation:
The answer is B on edg2020. Hope this helps. #classof2023
Make 24 using the numbers 1,5,7,8
Answer:
1+7+8+8
Step-by-step explanation:
Answer:
1+7+8+8
Step-by-step explanation:
Write the smaller solution first, and the larger solution second. h(x)=-5x^2 +180h(x)=−5x 2 +180
Answer:
x = -6,6
Step-by-step explanation:
h(x)=−5x^2 +180
Assuming you want to find the zero's
0 =−5x 2 +180
Subtract 180 from each side
0-180=−5x^2 +180-180
-180 = -5x^2
Divide each side by -5
-180/-5 = -5x^2/-5
36 = x^2
Take the square root of each side
±sqrt(36) = sqrt(x^2)
±6 = x
x = -6,6
Answer:
-6, 6
Step-by-step explanation:
h(x) = -5x² + 180
-5x² + 180 = 0
x² = 36
x = -6, 6
Josiah collected 15 postcards from across the United States. Then each of
his 4 grandparents gave him 7 more postcards for his collection. Which
expression could be used to find the total number of postcards he has in
his collection?
A (7+4) x 15
B (7 x 4) x 15
C (7 x 4) + 15
D (7+4) + 15
Please help for 25 points
Answer:
The answer is C) (7×4)+15
Answer:
Step-by-step explanation:
I think C. Because you would multiply the 7 and 4 then you would just add the 15
787,000 in scientific notation
Answer:
7.87 × 10 ^6
Step-by-step explanation:
787,000 in scientific notation is 7.87 × 10⁶.
What is a scientific notation?In Mathematics and Statistics, any numerical data (number) can be written in scientific notation as shown below:
[tex]a \times b^{n}[/tex]
Where
a represent a real number.b represent an integer.787,000 = 700,000 + 87,000
By counting the number of digits, we can logically deduce that they are equal to six (6). In this context, the given number can be written in scientific notation as shown below:
787,000 = 7.87 × 10⁶
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The diameter of a circle is 4 cm. Find its area to the nearest tenth.
Answer:
12.57cm²
Step-by-step explanation:
Hopefully this helps :)
The area of a circle with a diameter of 4 cm is found by using the formula A = πr² with the radius being half the diameter. After calculation, the area of the circle is 12.56 cm², which is rounded to 12.6 cm² to the nearest tenth.
The question requires us to find the area of a circle when given its diameter, which is 4 cm. To calculate the area, we will use the formula A = πr², but first, we need to determine the radius of the circle. As the radius is half the diameter, for our circle, the radius (r) is 2 cm (half of 4 cm). Substituting this value into the area formula:
A = πr²
= 3.14 × (2 cm)²
= 3.14 × 4 cm²
= 12.56 cm²
To provide the answer to the nearest tenth, we round the area to 12.6 cm². Therefore, the area of the circle is 12.6 cm²
when rounded to the nearest tenth.
If a line plot represents 12 pieces of data, how many dots does it have?
Enter your answer in the box.
Hence, there are 12 pieces of data in the given line lot, so there will be 12 dots.
Step-by-step explanation:
A line plot is a graph that shows frequency of data along a number line. It is best to use a line plot when comparing fewer than 25 numbers. It is a quick, simple way to organize data.
The main difference between a line plot and a line graph is that the line plot shows the frequency of number within a set, and the line graph shows the value of one variable relative to another.The number of dots in a line plot will be equal to the number of data points.
Hence, there are 12 pieces of data in the given line lot, so there will be 12 dots.
Gabriel is at the grocery store, and wants to figure out his total cost before he gets to the register. He bought 2.5 pounds of apples that are x dollars a pound and 2 bags of lettuce for y dollars each. Which expressions would represent his total cost?
Answer:
I KNOW IT!!^^
Step-by-step explanation:
All right the answer would be 2.5x+2y=? so basically since x represents the cost of one pound of apples and y represents the cost of one bag of lettuce i had 2 this 2 last year i hope this helped u!!^^
What is the product of a^2/5(10)
Answer:
[tex]\frac{a^{2} }{10}[/tex]
Step-by-step explanation:
5*10 = 50. 50 = 25+25. The sqrt of 25 is 5, so 2 5's make 10.
The calculation of the product [tex]a^2/5(10)[/tex] involves squaring the base 'a', then dividing by 5 and finally, multiplying by 10. The solution will depend on the given value of 'a'.
Explanation:The question is asking for the product of [tex]a^2/5(10),[/tex] neglecting any typos. Here, we are assuming that the exponent 'a' in [tex]'a^2[/tex]' is the base, which is usually a positive integer. Using the given values, the expression becomes:
[tex]10 \times (a^2 / 5)[/tex]
To simplify this expression, we first square the base 'a'. If for example, 'a' is equal to 5 (the square of 5 is 25), the expression can be rewritten as:
10 * (25 / 5)
The final calculation becomes: 10 * 5 equaling 50 as the final answer. Please note that this example is strictly for illustrative purposes and the solution will vary according to the provided value of 'a'. The concept underlying the problem is exponentiation, multiplication, and division.
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Write two statistical questions that Evan could have asked to get his results. Then explain why Evan could not have asked a non-statistical question to get his results.
Answer:
1. How many hours do you spend on studying on Saturday?
2.How many hours do you spend on playing game on Saturday?
Step-by-step explanation:
I think your question is missed of key information, allow me to add in and hope it will fit the original one. Please have a look at the attached photo.
My answer:
Statistical questions means that when you ask, you expect to have the variety of answers. Because each person will give different answer.
Two statistical questions that Evan could have asked to get his results are;
1. How many hours do you spend on studying on Saturday?
2.How many hours do you spend on playing game on Saturday?
Evan could not have asked a non-statistical question to get his results because there is only on answer and you expect the same answer from everyone you ask.
For ex: how many students spend 3 hours studying, the answer is only one, it is 2 in Evan survey.
50 Points + 50 points +
1. Find the measurements of DE
2. Find the lengths of BC EC
3. Find the 1) width, 2) height only workings.
Do not need perimeter or area for question 3. So just need exact workings
for 1, 2 and 3 width and height parts.... if answering questions.
Answer:
see below
Step-by-step explanation:
Angle ACE = DCE since they are vertical angles
Angle A = Angle E parallel lines cut by a transversal form congruent alternate interior angles
Angle B = Angle D parallel lines cut by a transversal form congruent alternate interior angles
When all three angles are equal, the triangles are similar.
We can use ratios to find DE
DE CE
------- = ----------
AB AC
DE 8
------- = ----------
12 10
Using cross products
10 DE = 8*12
10 DE = 96
Divide by 10
DE = 9.6
2nd problem
Angle ADE is congruent to ABC because corresponding angles are conguent when parallel lines cut by a transversal
Angle AED is congruent to ACB because corresponding angles are conguent when parallel lines cut by a transversal
Angle A equals angle A by the reflexive property
When all three angles are equal, the triangles are similar.
We can use ratios to find BC
AD DE
------- = ----------
AB BC
8 5
------- = ----------
8+6 BC
Using cross products
8 BC = 5 (14)
8 BC =70
Divide each side by 8
BC =8.75
We can use ratios to find EC
AD AE
------- = ----------
AB AC
8 4.2
------- = ----------
8+6 4.2+EC
Using cross products
8 (4.2+EC) = 4.2*14
33.6 +8EC = 58.8
Subtracting 33.6
8EC =25.2
Dividing by 8
EC =3.15
Translate the expression with rational exponents into a radical expression. Simplify if necessary.
(233) -
Look at the attached picture⤴
Hope it will help u..
Answer and Step-by-step explanation:
Whenever we have a fractional exponent, the numerator is always going to be the exponent, and the denominator will be the root.
Here, the numerator is 4, so we taking 343 to the fourth power. At the same time, since the denominator is 3, we are taking the cube root of 343. Thus, we can write the expression as:
[tex]\sqrt[3]{343^4}[/tex]
We want to simplify this. We need to complete both operations, but it doesn't matter what order we do them in. In fact, I would do the cube root first because that won't lead to gigantic numbers:
[tex](\sqrt[3]{343} )^4=7^4=2401[/tex]
Thus, the answer is, I believe, 2401 (although it's not in radical form, the problem asked for the simplified answer, which is this).
Hope this helps!