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Crazy boy [7]
3 years ago
15

When Jennifer spent 3/7 of her money, she has $72 left. How much money did Jennifer start with?

Mathematics
1 answer:
weeeeeb [17]3 years ago
3 0
After spending 3/7, she is left with;
4/7
Now, 4/7 is equivalent to 72
7/7 is equivalent to?
\frac{7*72}{4}
= 126 dollars
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(solve the literal equation for y ). <br> 1.) 8x + 2y = 18<br> 2.) 7x - y = 35
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4 0
3 years ago
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What is the range of a function f(x)=-x+15 when the domain is {-3,-1,11}?
hodyreva [135]

Answer:

The range is the output value or the y value.

You would work backwards to find the domain.

f(x) = 4x - 1                              f(x) = 4x - 1

3 = 4x - 1                                    7 = 4x - 1

add 1 to both sides                    add 1 to both sides

4 = 4x                                            8 = 4x

divide both sides by 4              divide both sides by 4

x = 1                                              x = 2

f(x) = 4x - 1                                  f(x) = 4x - 1

11 = 4x - 1                                      15 = 4x - 1

add 1 to both sides                      add 1 to both sides

12 = 4x                                              16 = 4x

divide both sides by 4                  divide both sides by 4

x = 3                                                    x = 4

Domain { 1, 2, 3, 4}

Step-by-step explanation:

4 0
3 years ago
Patrick bought a pair of jeans which originally cost $88 at a 25% discount. How much was marked off the original price?
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It should be 66 but im not that good at math
5 0
3 years ago
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Company A offers a starting salary of $28,000 with a raise of $3,000 each year. Company B offers a starting salary of $36,000 wi
8090 [49]
Starting salary offered by Company A = $28000
Amount of raise per year given by Company A per year = $3000
Starting salary offered by Company B =$36000
Amount of raise per year given by Company B = $2000
Let us assume the number of years after which the salary offered by Company A will be the same as Company B = x
Then
28000 + 3000x = 36000 + 2000x
3000x - 2000x = 36000 - 28000
1000x = 8000
x = 8000/1000
   = 8 years
So from the above deduction we can conclude that after 8 years the salary of Company A and Company B will become equal.
More information's are also provided for the second part of the question.
Starting salary offered by Company C = $18000
Let us assume the amount of raise per year given by Company C = z dollars
Number of years in which the salaries of Company C will become equal to the salaries of Company A and B = 8 years
Then
18000 + 8z = 28000 + (3000 * 8)
18000 + 8z = 28000 + 24000
18000 + 8z = 52000
8z = 52000 - 18000
8z = 34000
z = 34000/8
   = 4250 dollars
From the above deduction we can conclude that the raise given by Company C should be $4250.
4 0
3 years ago
Solve the following quadratic equation using the quadratic formula. Separate multiple answers with a comma if necessary.
Valentin [98]

Answer:

y^2 -4y +6=0

y =\frac{-b \pm \sqrt{b^2 -4ac}}{2a}

Where a = 1, b= -4 ,c =6

And replacing we got:

y = \frac{-(-4) \pm \sqrt{4^2 -4(1)(6)}}{2*1}

And solving we got:

y = \frac{4 \pm \sqrt{-8}}{2} =2 \pm 2\sqrt{2} i

Where i =\sqrt{-1}

And the possible solutions are:

y_1=2 + 2\sqrt{2} i , y_2 = 2 - 2\sqrt{2} i

Step-by-step explanation:

For this case we use the equation given by the image and we have:

-y^2 +4y -6=0

We can rewrite the last expression like this if we multiply both sides of the equation by -1.

y^2 -4y +6=0

Now we can use the quadratic formula given by:

y =\frac{-b \pm \sqrt{b^2 -4ac}}{2a}

Where a = 1, b= -4 ,c =6

And replacing we got:

y = \frac{-(-4) \pm \sqrt{4^2 -4(1)(6)}}{2*1}

And solving we got:

y = \frac{4 \pm \sqrt{-8}}{2} =2 \pm 2\sqrt{2} i

Where i =\sqrt{-1}

And the possible solutions are:

y_1=2 + 2\sqrt{2} i , y_2 = 2 - 2\sqrt{2} i

4 0
3 years ago
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