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qaws [65]
3 years ago
14

Joanna made $104.50 for working 11 hours this week. How much money will she make if she works 15 hours?

Mathematics
2 answers:
skelet666 [1.2K]3 years ago
6 0
To get the money Joanna makes per hour, divide her earnings of $104.50 by 11. You should get $9.50, the amount she makes an hour. Then, since we are looking for how much she makes in 15 hours, multiply 9.5 by 15, and the result should be that Joanna makes $142.50 in 15 hours.
Brut [27]3 years ago
4 0
104.5/11=9.5
9.5x15=$142.50
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What multiples to 42 and adds to -2
solniwko [45]

Answer:

Step-by-step explanation:

xy = 42

x+y = - 2                   Substitute into the top equation

y = -2 - x                   Put in for y

x(-2 - x) = 42             Remove the brackets

-2x - x^2 = 42           Subtract 42 from both sides.

-2x - x^2 - 42 = 0      Put in the more normal order.

-x^2 - 2x - 42 = 0      Multiply by -1

x^2 + 2x + 42 = 0

This cannot be factored. It gives complex roots as it is written. I will give you the answer but I kind of doubt the question is correct.

x1 = - 1 + 6.40i

x2 = -1 - 6.40i

Leave a comment if you have a correction.

4 0
3 years ago
A student takes a multiple-choice test with 8 questions on it, each of which has 4 choices. The student randomly guesses an answ
zimovet [89]

Answer:

0.900

Step-by-step explanation:

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3 0
3 years ago
1. The area of a circle is 60 square units. What is the area of ...
AVprozaik [17]

Multiply the area of the circle by the percentage:

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3 0
2 years ago
Consider the differential equationy′′+3y′−10y=0.(a) Find the general solution to this differential equation.(b) Now solve the in
RSB [31]

Answer:

Y= 2e^(5t)

Step-by-step explanation:

Taking Laplace of the given differential equation:

s^2+3s-10=0

s^2+5s-2s-10=0

s(s+5)-2(s+5) =0

(s-2) (s+5) =0

s=2, s=-5

Hence, the general solution will be:

Y=Ae^(-2t)+ Be^(5t)………………………………(D)

Put t = 0 in equation (D)

Y (0) =A+B

2 =A+B……………………………………… (i)

Now take derivative of (D) with respect to "t", we get:

Y=-2Ae^(-2t)+5Be^(5t)   ....................... (E)

Put t = 0 in equation (E) we get:

Y’ (0) = -2A+5B

10  = -2A+5B ……………………………………(ii)

2(i) + (ii) =>

2A+2B=4 .....................(iii)

-2A+5B=10 .................(iv)

Solving (iii) and (iv)

7B=14

B=2

Now put B=2 in (i)

A=2-2

A=0

By putting the values of A and B in equation (D)

Y= 2e^(5t)

6 0
3 years ago
How do you solve this
UNO [17]
7 divided by 1 is 7 so you would do long division
5 0
3 years ago
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