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2 years ago

Sandy sold half of her comic books and then brought 6 more.She now has 11.How many did she begin with?

Mathematics

2 answers:

andreyandreev [35.5K]2 years ago

8 0

10. 11 - 6 = 5 x 2 = 10 :)

grigory [225]2 years ago

7 0

10 books is the answer

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Find the measure of an angle whose supplement measures seventeen times its measure

Lilit [14]

supplement angles, sum = 180
lets x = angle
its supplement = 180 - x

x + 17x = 180
18x = 180
x = 10
180 -10 = 170

answer
angle = 10
its supplement = 170

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3 years ago

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saveliy_v [14]

Bread A because it was more likely to have it ..

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3 years ago

Simplify the following polynomial expression

Juli2301 [7.4K]

Distribute the negative sign

$7x^2-3x-6$

Combine like terms

-9x^2 + 7x^2 = -2x^2

9x - 3x = 6x

13 - 6 = 7

$-2x^2 +6x + 7$

Answer

$-2x^2 +6x + 7$

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3 years ago

-7(k-8)+2k

Vladimir79 [104]

Step-by-step explanation:

-7(k-8)+2k Use distributive property.

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-5k+56

Mother knows best :)

4 0

3 years ago

Felix scored 52 and 64 on his first two test in Sociology 212. What must he get on the third test to get an average of the three

Pie

Answer:

Felix's third test score must be greater than 94

Step-by-step explanation:

Felix scores on Sociology 212 tests:

1st test - 52

2nd test - 64

3rd test - x

Find the average of Felix's scores:

$\text{Average}=\dfrac{\text{The sum of all scores}}{\text{The total number of scores}}\\ \\\text{Average}=\dfrac{52+64+x}{3}$

An average of the three test must be above 70, this means

$\text{Average}>70\\ \\\dfrac{52+64+x}{3}>70$

Solve this inequality. First, multiply it by 3:

$52+64+x>210\\ \\x>210-52-64\\ \\x>94$

4 0

3 years ago