2 years ago

Here are 10 test scores: 30, 74, 76, 77, 78, 79, 80, 80, 82, 84. The mean of these scores is 74.

1 answer:

8 0

We add up all those numbers (excluding 30) and divide by the number of numbers (9). This results in 78.8 (round up to 79).

79-74 = 5. So the mean has increased by 5 points. (C)

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What is the Distributive property of 18times 4 =72

Fiesta28 [93]

18 x 4 = 72

(9 x 2) x 4 = 72
9 x (2 x 4) = 72

6 0

2 years ago

Solve the equation.<br><br>-4 (y - 2) = 12<br><br>y = ?

inna [77]

First you distribute what’s outside the parentheses (the -4)

-4•4= -4y
-4•-2= 8

New equation: -4y+8=12

Now you solve like a normal equation
12-8 is 4

New equation: -4y=4

Now divide

Answer:-1

8 0

2 years ago

Please help me with these questions????

Softa [21]

5: THEO = what should happen
EXP = Wha actually happens.