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Fiesta28 [93]
3 years ago
8

Khan Academy’s question

Mathematics
1 answer:
prisoha [69]3 years ago
6 0

Answer:

Black Screen so sorry

Step-by-step explanation:

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Bob has two weekend jobs last weekend he made a total of $77 after working as a cashier for 5 hours and delivering newspapers fo
OlgaM077 [116]

Answer: $9 per hour at his job as a cashier and $8 per hour at his job delivering newspapers.

Step-by-step explanation:

1. Let's call the amount he got paid per hour at his job as a cashier: x.

Let's call the amount he got paid per hour at his job delivering newspapers: y.

2. Keeping on mind the information given in the problem above, you can make the following system of equations:

\left \{ {{5x+4y=77 \atop {6x+3y=78}} \right.

3. You can solve it by applying the Substitution method, as following:

- Solve for one of the variables from one of the equations and substitute it into the other equation to solve for the other variable and calculate its value.

- Substitute the value obtained into one of the original equations to solve for the other variable and calculate its value.

 4. Therefore, you have:

5x+4y=77\\5x=77-4y\\x=\frac{77-4y}{5}=15.4-0.8y

Then:

6(15.4-0.8y)+3y=78\\92.4-4.8y+3=78\\-1.8y=-14.4\\y=8

Finally:

5x+4(8)=77\\5x+32=77\\5x=45\\x=9

Therefore he got paid $9 per hour at his job as a cashier and $8 per hour at his job delivering newspapers.

5 0
3 years ago
Find three consecutive integers such that the sum of the largest and 5 times the smallest is -244. URGENT
Bad White [126]

Answer:

-39+5(-41)=244

Step-by-step explanation:

Consider 3 consecutive integers: (smallest) x, x+1 and x+2 (largest)

Five times the smallest means 5x

Sum of the largest and five times the smallest means x+2+5x

This sum is -244 means x+2+5x=-244

Solve this equation

x+2+5x=-244

6x+2=-244

6x=-244-2

6x=-246

x=-41

So, smallest number is -41, second is -40 and largest is -39

= -39+5(-41)=244

Hope this helps, have a nice day/night! :D

5 0
3 years ago
Wildlife resort has eight elephant cabs born during the summer and now has 31 total how many elephants were ending was there bef
Kipish [7]

The answer would be 23. 31-8=23

4 0
3 years ago
Use the figure below to find the values of x and y
irinina [24]

Step-by-step explanation:

hey.. everyone please

Vmwaajtexf

come

3 0
2 years ago
Read 2 more answers
PLEASE PLEASE HELP! If ABC is congruent to DEF by side side side triangle congruence, then angle B is congruent to angle E by wh
anygoal [31]
I believe your answer would be D.) because the triangles were already proven to be congruent
6 0
3 years ago
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