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Artyom0805 [142]
2 years ago
13

Evaluate the expression when a = -6 and c=7. C-8a

Mathematics
1 answer:
daser333 [38]2 years ago
3 0

Answer:

55

Step-by-step explanation:

Given the following question:

c-8a
c=7
a=-6

Substitute and solve by using PEMDAS:

c-8a
7-8(-6)
8\times-6=-48
7--48
7--48=55
=55

Your answer is "55."

Hope this helps.

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Is (A) correct or no????
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3. A mysterious metal medallion has a mass of 3,088 grams. Water is poured into a graduated glass container with a 10-by-10 cm s
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2 years ago
Help me please I dont understand
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Step-by-step explanation:

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4 0
3 years ago
She worked a total of 15 hours. If she makes $15 per hour tutoring and $9 per hour at the grocery store and made a total of $159
Ugo [173]

Answer:

11 hours she worked at the grocery store

Step-by-step explanation:

assuming,

the number of hours worked at tutoring = x

the number of hours worked at grocery store = y

which means,

the amount she made at tutoring = x* $15

the amount she made at grocery store = y*$9

we have 2 equations

<em>total number of hours</em>

1) x+y= 15  

<em>total amount she earned</em>

2) x* $15+ y* $9= $159

From equation 1

x+y= 15  

x=15-y

<em>we replace this x value in equation 2</em>

x* $15+ y* $9= $159

(15-y)* $15+ y* $9= $159

(15*15)- 15y+9y=159

225-6y=159

225-159=6y

66=6y

66/6=y

<u>11=y</u>  <em>the number of hours she worked at grocery store. </em>

<em>we place y=11 in our derived x equation</em>

x=15-y

x=15-11

<u><em>x=4 </em></u><em>the number of hours she worked at tutoring. </em>

3 0
3 years ago
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