Answer:
The system of equations are
x + y = 2600 …….equation (1)
and, 6x + 5y = 13700 ……equation (2)
Explanation:
Let x = amount of sales of phone;
y = amount of sales of computer
For phone, 6% of sales is 6% of x, or 6% * x = 0.06x.
Similarly for computer,
5% of y = 0.05y
Given the total sales; x + y = 2600
And commission; 0.06x + 0.05y = 137; or 6x + 5y = 13700
Therefore the system of equations are
x + y = 2600 …….equation (1)
6 x + 5 y = 13700 ……equation (2)
A machine bolts that are 12 mm long. The bolts are considered acceptable if they are within 0.2 mm of 12 mm. a. What is the longest the bolt can be and still be acceptable? SHOW WORK PLEASE!!!!!
Answer:
The longest bolt that can be acceptable is [tex](12+0.2)=12.2\ mm[/tex]
Step-by-step explanation:
To find the acceptable measure of the bolt we have to add and subtract the clearance limit.
a.For longest measure of the bolt we will perform addition.
And for shortest measure of the bolt we will go with subtraction.
So the longest acceptable measure of the bolt [tex]=12\ mm +0.2\ mm = 12.2\ mm[/tex]
Hope there question b is missing.
b.
The shortest measure of the bolt [tex]=12\ mm -0.2\ mm = 11.8\ mm[/tex]
The acceptable measure of the bolt are:
For longest it is [tex]12.2\ mm[/tex] and for shortest it is [tex]11.8\ mm[/tex]
$210 bicycles; 25% discount
Answer: $157.50 is the sale price
Step-by-step explanation:
because there is a 25% discount, 75% of the regular price will be the sale price
75% x 210 = $157.50 is the sale price
3. Which equation has a solution of 2/3 for n?
a. n - 1 = %
b. 16n = 24
c. 15n = 10
d. 1% + n = 3
What’s the answer
Answer:
C) 15n=10
Step-by-step explanation:
Because 15(2/3)=5*2=10.
Nick volunteer at the senior center each Saturday for 60 minutes and each Sunday for 40 minutes.He takes 2 weeks off every year . how many minutes does Nick volunteer in one year
Answer:
The total minutes Nick volunteer in a year are 5000 minutes.
Step-by-step explanation:
Given:
Nick volunteer Saturday for 60 minutes and each Sunday for 40 minutes. He takes 2 weeks off every year.
Now, how many minutes did he volunteer in one year.
So, in one year there are 52 weeks.
And, total weeks Nick volunteer are 50 in a year as he takes 2 weeks off every year.
And, total minutes in a week nick volunteer = 60+40= 100 minutes.
Now, for getting the total minutes Nick volunteer in a year, we multiply the total weeks he volunteer in a year from total minutes he volunteer in a week :
Total minutes Nick volunteer in a year = total weeks he volunteer in a year × total minutes he volunteer in a week
Total minutes Nick volunteer in a year [tex]=50\times 100\ minutes[/tex]
Total minutes Nick volunteer in a year [tex]=5000\ minutes[/tex]
Therefore, the total minutes Nick volunteer in a year are 5000 minutes.
is (1, 3), (2, 5), (2, 7), (4, 9) a function
Answer:
no becase the x value 2 has two y values 5 and 7. for it to be a function each x value can only have 1 y value
Step-by-step explanation:
Answer:
no it is not
Step-by-step explanation:
Please help!!!! Questions are in the picture above!! Question is worth 20 points please answer it correctly!!!!
Answer:
Step-by-step explanation:
points that lie on an axis do not lie in any quadrant.
So point A lies in the positive x-axis
The origin (0,0) does't lie on any quadrant.
Origin is the point that lies on both x-axis and y-axis
Find three ratios equivalent to the ratio described in each situation . The ratio of cats to dogs in park is 3/4
Answer:
6/8, 9/12, and 12/15
Step-by-step explanation:
3/4 + 3/4 = 6/8
6/8 + 3/4 = 9/12
9/12 + 3/4 = 12/15
please help :) this study island was due last week, and I cannot get past this question
Answer: For number one it's decreasing
Step-by-step explanation:
estimate 394/24 by first rounding each number so that it has only 1 nonzero digit.
Answer:
48 million
Step-by-step explanation:
Since 48,000,000 has TWO non-zero numbers, not one, it can't be the
answer.
The largest digit in the given number is the ten-millions digit, so
you want to round to the nearest ten million, rather than the nearest
million.
47,859,600 rounds to 50,000,000, to one significant digit.
Normally, we would say "round to one significant digit," but you
probably have not seen that term. Your question means the same th
To estimate 394/24, round 394 to 400 and 24 to 20, to get an estimated quotient of 20 after dividing the rounded figures.
Explanation:To estimate 394/24 by rounding each number to have only one nonzero digit, we round 394 to 400 and 24 to 20. Now, let's divide the rounded figures:
400 ÷ 20 = 20This gives us an estimated result. To round to the nearest whole number, we start with our original rounded figures since both have 0 decimal places. Therefore, our final estimate after rounding is 20.
When performing mathematical operations like this, it's important to use the rounding rules properly. For division and multiplication, we round the final answer to the number of significant figures that matches the number with the least significant figures used in the calculation.
Special Right Triangles: Decimal Answer ! What’s H and C ?! Help me please?! Round to the nearest tenth.
Answer:
h = 1.41
c = 3.46
Step-by-step explanation:
See the triangles diagram attached.
For the first triangle, Base = h, Hypotenuse = 2 and the angle between base and hypotenuse is 45°.
Therefore, [tex]\cos 45 = \frac{\textrm {Base}}{\textrm {Hypotenuse}} = \frac{h}{2}[/tex]
⇒ [tex]h = 2 \cos 45 = \frac{2}{\sqrt{2} } = \sqrt{2} = 1.414 = 1.41[/tex] (Answer)
{Rounded to the nearest tenth}
Again in the second triangle, Perpendicular = c, Hypotenuse = 4 and the angle between base and hypotenuse is 60°.
Therefore, [tex]\sin 60 = \frac{\textrm {Perpendicular}}{\textrm {Hypotenuse}} = \frac{c}{4}[/tex]
⇒ [tex]c = 4 \sin 60 = \frac{4 \times \sqrt{3} }{2} = 2\sqrt{3} = 3.46[/tex] (Answer)
{Rounded to the nearest tenth}
Mr. Johnson's lunch bill is 29.90, which includes a 15% tip
What is the price before the tip?
**URGENT 100 POINTS**
Answer:
26.
Step-by-step explanation:
15% of 29.90 is 3.90
26+3.90= 29.90
The price of Mr Johnson's lunch bill before the 15% tip paid is $26.
What is the price before tip?Percentage can be described as a fraction of an amount expressed as a number out of hundred.
In order to determine the price before the tip, divide the lunch bill by the percentage tip.
Price before the tip = lunch bill / ( 1 + percentage tip)
29.90 / 1/15 = $26
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Use the arithmetic series 14 + 6 + (–2) + (–10) + (–18) + (–26) + (–34) to answer each question. What is the common difference d of the arithmetic sequence on which the series is based? d =
Answer:
The difference (d) = - 8
Step-by-step explanation:
1. Let's review the data given to us for solving the question:
Arithmetic series : 14 + 6 + (–2) + (–10) + (–18) + (–26) + (–34)
2. What is the common difference d of the arithmetic sequence on which the series is based?
1st an 2nd element difference = 14 - 6 = 8
2nd and 3rd element difference = - 6 - 2 = -8
3rd and 4th element difference = - 2 + 10 = 8
4th and 5th element difference = -10 + 18 = 8
The difference (d) is 8 and it's negative because the series is lowering the previous value.
3. Proof of d = - 8
14 - 8 = 6
6 - 8 = - 2
- 2 - 8 = - 10
- 10 - 8 = - 18
- 18 - 8 = - 26
-26 - 8 = -34
Answers:
1st: -8
2nd: 14 + (k-1)(-8)
3rd: x=7 y= 22 z= -8
explanation:
i did it :))
find the equation of a parabola that opens up and has the following x intercepts (-3,0) and (4,0)
The equation of a parabola that opens up and has the following x intercepts (-3,0) and (4,0) is [tex]y=x^{2}-x-12[/tex]
Solution:We have to find the equation of a parabola that opens up and has the following x intercepts (-3, 0) and (4, 0)
x-intercepts of the parabola are (−3, 0) and (4, 0)
So, we can form an equation:
Also x = 4
x – 4 = 0
x – 4 = 0 is another factor of quadratic equation.
The quadratic function is:
[tex]\begin{array}{l}{y=(x+3)(x-4)} \\\\ {y=x^{2}-4 x+3 x-12} \\\\ {y=x^{2}-x-12}\end{array}[/tex]
Hence, the equation of the parabola is [tex]y=x^{2}-x-12[/tex]
To find the equation of a parabola with x-intercepts at (-3,0) and (4,0), we can use the factored form of a quadratic equation. By plugging in the values of the roots and simplifying, we can determine that the equation of the parabola is y = x^2 - x - 12.
Explanation:To find the equation of a parabola that opens up and has x-intercepts at (-3,0) and (4,0), we can start by recognizing that the x-intercepts are the points where the parabola intersects the x-axis. This means that the parabola has roots of -3 and 4. To find the equation, we can use the factored form of a quadratic equation: (x - root1)(x - root2) = 0. Plugging in the values of the roots, we get (x - (-3))(x - 4) = 0. Simplifying this, we have (x + 3)(x - 4) = 0. Expanding this, we have x^2 - x - 12 = 0. Therefore, the equation of the parabola is y = x^2 - x - 12.
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+
A student earned 30 out of 35
points on an exam. C What percent
of the total points did the student
earn? Round to the nearest
percent
w
4. Write a number story to show 917 + 67 = . Solve the problem.
Answer:
Sally had 917 bottles of water \she plans on buying 67 more bottles of water so in all she will have 984 bottles of water.
Step-by-step explanation:
which of the following is the probability that a blue marble will NOT be selected from a bag containing 9 red marbles, 6 blue marbles, 7 green marbles, and 11 yellow marbles if one is selected randomly?
18%?
32%?
82%?
79%?
Answer:
82%
Step-by-step explanation:
The total number of marbles is 9 + 6 + 7 + 11 = 33. 6 marbles are blue, so 27 are not. So the probability of selecting a non-blue marble is 27/33 ≈ 82%.
The probability of NOT getting a blue marble is 82%.
What is probability?Probability denotes the possibility of the outcome of any random event.
Given that, a bag contains 9 red marbles, 6 blue marbles, 7 green marbles, and 11 yellow marbles, one is selected randomly, we need to find the probability that a blue marble will not be selected,
So, the probability of NOT event = 1-P(E)
Therefore,
The probability of getting a blue marble = 6/33 = 2/11
The probability of NOT getting a blue marble = 1-2/11 = 9/11
= 0.81818181 ≈ 82%
Hence, the probability of NOT getting a blue marble is 82%.
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mother age is three times biger than from the daughter.In 10 years mother's age will be 2 times bigger than the daughter.How many years the daughter and mmother are
Answer:
20 years apart.
Step-by-step explanation:
Daughter is 10 years old, and mother is 3 times older. This makes mother 30 years old. There is a 20 year difference between them.
Ten years later, the daughter is 20 years old. Since the mother is 20 years older, she is now 40, which is 2 times older than the daughter.
For which discriminant is the graph possible
b2-4ac=0
b2-4ac=-1
b2-4ac=4
Answer:
The graph is possible for [tex]b^2-4ac=4[/tex]
Step-by-step explanation:
we know that
The discriminant of a quadratic equation of the form
[tex]ax^{2} +bx+c=0[/tex]
is equal to
[tex]D=b^2-4ac[/tex]
If D=0 the quadratic equation has only one real solution
If D>0 the quadratic equation has two real solutions
If D<0 the quadratic equation has no real solution (complex solutions)
In this problem , looking at the graph, the quadratic equation has two real solutions (the solutions are the x-intercepts)
so
[tex]b^2-4ac > 0[/tex]
therefore
The graph is possible for [tex]b^2-4ac=4[/tex]
Answer:
b^2 – 4ac = 4
Abel has 3,330 toothpicks. He wants
to use them all to make a floor mat with 18 equal rows.
Use the bar diagram to write a division equation. Then
solve the equation to find how many toothpicks Abel
should use in each row.
Answer:
3,330/18=185
so
185 columns*18 rows
3,330/18=185
so
185 columns*18 rows
which value is equivalent to the expression 2^3 + 3^4
Answer:
89
Step-by-step explanation:
2^3=2*2*2=8
3^4=3*3*3*3=9*9=81
8+81=89
what’s the slope intercept form of -5y=2x+11?
Answer:
y = (2/5) x + (11/5)
Step-by-step explanation:
recall that the slope-intercept form of a linear equation takes the general form:
y = mx + b
In this case, we simply have to use algebra rules to rearrange the given equation such that it looks like the one above:
-5y = 2x + 11 (divide both sides by -5)
y = -(2/5) x - (11/5) (answer)
Ratio equivalent to 3 : 4
Answer:
8:6
Hope it helped. :)
Answer: 6:8
to Find any equivalent ratio, you multiply both numbers (in this example, 6 and 8) by the same number (in this example, 2).
Help me!!!!!!! ASAP!!
Answer:
I got youuuu
Step-by-step explanation: what you need?
Answer:
Initial fee: 6 Dollars. Fee per Kilometer: 1.30588235294
Step-by-step explanation:
Divide 222/170=Fee per a Kilo
What is the method for calculating what percentage a number is of another number
Answer:
To calculate percentages, start by writing the number you want to turn into a percentage over the total value so you end up with a fraction. Then, turn the fraction into a decimal by dividing the top number by the bottom number. Finally, multiply the decimal by 100 to find the percentage.
Step-by-step explanation
To calculate what percentage one number is of another, divide the 'part' by the 'total' and multiply by 100. This formula is used to convert a ratio into a percentage, which represents a part per hundred of the total.
The method for calculating what percentage a number is of another number involves a straightforward formula: 'part over total, times one hundred, equals percent'. For example, if a class has 35 students and 13 are wearing sandals, you would use the equation 13 divided by 35, multiplied by 100, to find the percentage. The calculation would be 13/35 x 100, which is 0.37 x 100, resulting in 37 percent of the students wearing sandals.
Calculating Percents
To express a fractional amount as a percent, you divide the numerator (the part) by the denominator (the total) and then multiply by 100. The percent symbol, %, is used to indicate that the number is a percentage of the total. For instance, 3 out of 4 can be written as 3/4, which is equal to 0.75, and when multiplied by 100 gives you 75%.
Another example is understanding voter registration percentages. If 10,458 out of 18,145 students registered to vote at a college, the equation to find the percentage would be 10,458/18,145 x 100, equal to 58 percent registration.
Thomas buys 6 souvenirs for his friends and family. each gift takes up 1/15 of his suitcase. If he has two suitcases, how much room is left for his own belongings in his suitcases?
Answer:
Thomas still has 1 3/5 suitcases available for his own belongings.
Step-by-step explanation:
1. Let's review the data given to us for solving the question:
Number of souvenirs bought by Thomas = 6
Space that each souvenir takes of Thomas suitcase = 1/15
Number of Thomas suitcases = 2
2. How much room is left for his own belongings in his suitcases?
Let's find out how much space the souvenirs take:
Number of souvenirs * Space that each souvenir takes
6 * 1/15 = 6/15 = 2/5 (Dividing by 3 the numerator and the denominator)
The souvenirs take 2/5 of one suitcase.
Now, we can calculate the room that is left for Thomas' belongings.
2 Suitcases - 2/5 for the souvenirs
2 - 2/5 = 10/5 - 2/5 = 8/5 = 1 3/5
Thomas still has 1 3/5 suitcases available for his own belongings.
Note: Same answer to question 14040097, answered by me.
The band at Brown High School sells tickets for catered dinners to raise money for field trips. Spaghetti dinner
tickets cost $7.25, and barbecue dinner tickets cost $8.75. The band sold twice as many spaghetti dinners as
barbecue dinners and raised $2,790. Which of the following sets of equations can be used to determine the number
of spaghetti dinner tickets, x, and the number of barbecue dinner tickets, y, sold?
x = 2y
7.25x + 8.75y = 2,790
2x = y
7.25x + 8.75y = 2,790
© x = 2y
8.75x + 7.25y = 2,790
© 2x = y
8.75x + 7.25y = 2,790
Answer: First option.
Step-by-step explanation:
Let be "x" the number of spaghetti dinner tickets sold and "y" the number of barbecue dinner tickets sold.
You know that 1 spaghetti dinner ticket costs $7.25; so the total amount of money earned selling these tickects can be represented with this expression:
[tex]7.25x[/tex]
Since 1 barbecue dinner ticket costs $8.75; the total amount of money earned selling them can be represented with this expression:
[tex]8.75y[/tex]
Knowing that the total amount of money the band raised was $2,790, we can write the following equation to represent this situation:
[tex]7.25x+8.75y=2,790[/tex]
The band sold twice as many spaghetti dinners as barbecue dinners, which means that the amount of spaghetti dinners sold was two times the amount of barbecue dinners sold.
This can be represented with this equation:
[tex]x=2y[/tex]
Therefore, the set of equations that can be used to find "x" and "y", is:
[tex]\left \{ {{x=2y} \atop {7.25x+8.75y=2,790}} \right.[/tex]
find a polynomial of degree 3 with real cofficients and zeros of -3,-1,4 for which f(-2)=24
[tex]\bf \textit{zeros at } \begin{cases} x = -3\implies &x+3=0\\ x = -1\implies &x+1=0\\ x = 4\implies &x-4=0 \end{cases}\qquad \implies (x+3)(x+1)(x-4)=\stackrel{y}{0} \\\\\\ (x^2+4x+3)(x-4)=0\implies x^3~~\begin{matrix}+ 4x^2 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~+3x~~\begin{matrix} -4x^2 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~-16x-12=0 \\\\\\ x^3-13x-12=0[/tex]
we know that f(-2) = 24, namely when x = -2, y = 24, let's see if that's true
[tex]\bf x^3-13x-12=y\implies \stackrel{x = -2}{(-2)^3-13(-2)-12}=y \\\\\\ -8+26-22=y \implies 6=y[/tex]
darn!! no dice.... hmmmm wait a second.... 4 * 6 = 24, if we could just use a common factor of 4 on the function, that common factor times 6 will give us 24, let's check.
[tex]\bf 4(x^3-13x-12)=y\implies \stackrel{x = -2}{4[~~(-2)^3-13(-2)-12~~]}=y \\\\\\ 4[~~-8+26-22~~]=y\implies 4[6]=y\implies 24=y \\\\[-0.35em] ~\dotfill\\\\ ~\hfill 4x^3-52x-48=y~\hfill[/tex]
what is x2/3•x2/15 show your work
Answer:
[tex]\large\boxed{x^\frac{4}{5}}[/tex]
Step-by-step explanation:
[tex]x^\frac{2}{3}\cdot x^\frac{2}{15}\qquad\text{use}\ a^n\cdot a^m=a^{n+m}\\\\=x^{\frac{2}{3}+\frac{2}{15}}\qquad\text{LDC = 15}\\\\=x^{\frac{2\cdot5}{3\cdot5}+\frac{2}{15}}=x^{\frac{10}{15}+\frac{2}{15}}=x^{\frac{12}{15}}=x^{\frac{12:3}{15:3}}=x^\frac{4}{5}[/tex]
Rewrite 27+36 using the GCF and distributive property
Answer:
27 + 36 = 9(3 + 4)Step-by-step explanation:
[tex]\text{Distributive property:}\ a(b+c)=ab+ac\\\\27=\boxed{9}\cdot3\\\\36=\boxed{9}\cdot4\\\\GCF(27,\ 36)=\boxed{9}\\\\\\27+36=\boxed{9}\cdot3+\boxed{9}\cdot4=\boxed{9}(3+4)[/tex]
Pick the expression that matches this description:
A 3^rd degree binomial with a constant term of 8
Choose 1 answer:
(Choice A)
8x^3+2x+3
(Choice B)
x^3-x^2+8
(Choice C)
2x^8+3
(Choice D)
-5x^3+8
Answer: Choice D, -5x^3 + 8
A binomial consists of two terms being added or subtracted. The two terms are -5x^3 and 8. The term -5x^3 has a leading coefficient -5 and exponent 3. The largest exponent determines the degree of the polynomial. The 8 is constant as there are no variables attached or multiplying with it.