All categories

2 years ago

Robert earned scores of 81, 93, 76, and 78 on four English tests. Determine his score on the

Mathematics

1 answer:

tekilochka [14]2 years ago

3 0

Answer:

Step-by-step explanation:

81 + 93 + 76 + 78 + 97 = 425

425/5 = 85

You might be interested in

How do you do this. Please give a full answer and explain why.

OverLord2011 [107]

Law of Exponent

$\displaystyle \large{ {a}^{ - n} = \frac{1}{ {a}^{n} } }$

Compare the terms.

$\displaystyle \large{ {a}^{ - n} = {( - 2)}^{ - 3} }$

Therefore, a = -2 and n = 3. From the law of exponent above, we receive:

$\displaystyle \large{ {( - 2)}^{ - 3} = \frac{1}{ {( - 2)}^{ 3} } }$

Exponent Def. (For cubic)

$\displaystyle \large{ {a}^{3} = a \times a \times a }$

Factor (-2)^3 out.

$\displaystyle \large{ {( - 2)}^{ - 3} = \frac{1}{( - 2) \times ( - 2) \times ( - 2)}}$

(-2) • (-2) = 4 | Negative × Negative = Positive.

$\displaystyle \large{ {( - 2)}^{ - 3} = \frac{1}{4 \times ( - 2)}}$

4 • (-2) = -8 | Negative Multiply Positive = Negative.

$\displaystyle \large{ {( - 2)}^{ - 3} = \frac{1}{ - 8}}$

If either denominator or numerator is in negative, it is the best to write in the middle or between numerator and denominators.

Hence,

$\displaystyle \large \boxed{ {( - 2)}^{ - 3} = - \frac{1}{ 8}}$

The answer is - 1 / 8

3 0

2 years ago

Multiply (5x-1)(6x^2+3x+7) SHOW WORK

notsponge [240]

sorry for using printed paper, I tried my best to avoid the lines

4 0

2 years ago

Read 2 more answers

what 2 numbers can be multiplied to equal 18 but can also be subtracted or added to each other to equal 9

Katena32 [7]

3 x 6 = 18

3+ 6 - 9

8 0

2 years ago

Read 2 more answers

To solve the problem: "What is 3/4 of 12," you would Subtract O Divide O Multiply O Add

Firdavs [7]

Answer:you should multiply

Step-by-step explanation:

Because 3/4x12=9

4 0

2 years ago

Find the slope of the graphed line

Anna [14]

Answer:

Step-by-step explanation:

Pick two points on the line

(0,-5) and (1,-1)

We can find the slope using

m = (y2-y1)/(x2-x1)

= ( -1 - -5)/(1 - 0)

(-1+5)/(1-0)

4/1

= 4

7 0

2 years ago