Ask question

Ask question

All categories

Dmitry_Shevchenko [17]

3 years ago

10

Mallory makes $10 per hour babysitting and $8 per hour working at the local grocery store. Last week she babysat for 6 hours. He

r total gross earnings for both jobs was $180. How many hours did she work at the grocery store?

2 answers:

miv72 [106K]3 years ago

6 0

Mallory would have worked for 15 hours

abruzzese [7]3 years ago

6 0

10(6)+8x=180
60+8x=180
8x=120
x=15

You might be interested in

As part of a study done for a large corporation, psychologists asked randomly selected employees to solve a collection of simple

zhenek [66]

Answer:

$P(A')=1-0.411=0.589$

And that represent the probability that they take longer than 7 minutes to solve the puzzles.

Step-by-step explanation:

The complement rule is a theorem that provides a connection between the probability of an event and the probability of the complement of the event. Lat A the event of interest and A' the complement. The rule is defined by: $P(A)+P(A') =1$

On this case we have that n= 56 represent the employees selected to solve the puzzles.

We know that 23 out of the 56 selected solved the puzzles in less than 7 minutes.

Let's define the events A and A' like this:

A: Employees solved puzzles in less than 7 minutes

By the complement rule then:

A' : Employees solved puzzles in more than 7 minutes

Based on this we are interested to find the probability for A'

We can begin finding P(A), from the definition of probability we know:

$P(A)=\frac{Possible outcomes}{Total outcomes}$

For this case if we replace we got:

$P(A) =\frac{23}{56}=0.411$

And using the complemnt rule we got:

$0.411 +P(A')=1$

And solving for P(A') we got:

$P(A')=1-0.411=0.589$

And that represent the probability that they take longer than 7 minutes to solve the puzzles.

4 0

3 years ago

Which choice correctly expresses the number below in scientific notation?<br> 0.000607

dusya [7]

Answer:

Correct answer is: E

Step-by-step explanation:

8 0

4 years ago

Expand and simplify <br><br> A. (x – 2y)(y – 3x)<br><br> B. (2p+3)(p^2-4p-7)

emmasim [6.3K]

Answer:

A. (x−2y)(y−3x)

=(x+−2y)(y+−3x)

=(x)(y)+(x)(−3x)+(−2y)(y)+(−2y)(−3x)

=xy−3x2−2y2+6xy

=−3x2+7xy−2y2

B. (2p+3)(p2−4p−7)

=(2p+3)(p2+−4p+−7)

=(2p)(p2)+(2p)(−4p)+(2p)(−7)+(3)(p2)+(3)(−4p)+(3)(−7)

=2p3−8p2−14p+3p2−12p−21

=2p3−5p2−26p−21

Hope it helps

Please mark me as the brainliest

Thank you

5 0

3 years ago

8*4+4y=60 solve the problem

masha68 [24]

Y=7, i hope this helps:)

5 0

3 years ago

the sum of four times a number and another number is 10. The difference of the two numbers is 35. What is the larger number? Als

valkas [14]

Answer:

The two numbers are 9 and -26.

The larger number is 9.

Step-by-step explanation:

Let the two unknown numbers be x and y.

The sum of a four times a number x and another number y is 10. Hence:

$4x+y=10$

And the difference between the two numbers is 35. So:

$x-y=35$

So, we have the system of equations:

$\left\{ \begin{array} \ 4x+y=10 \\ x-y=35 \end{array}$

From the second equation, we can add y to both sides:

$x=y+35$

Now, we can substitute this into the first equation:

$4(y+35)+y=10$

Distribute:

$4y+140+y=10$

Simplify:

$5y+140=10$

Subtract 140 from both sides:

$5y=-130$

Divide both sides by 5:

$y=-26$

So, the value of y is -26 .

Then it follows that the value of x is:

$x=y+35$

Substitute -26 for y:

$x=-26+35=9$

So, our two numbers are 9 and -26.

The larger number is 9.

So, our answer is 9.

7 0

3 years ago

Read 2 more answers