3 years ago

Simplify -7y(4-y) plz also include explanation

Mathematics

1 answer:

Lana71 [14]3 years ago

6 0

Use distributive property
-28y+8y= -20y

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A textbook store sold a combined total of 332 history and chemistry textbooks in a week. The number of chemistry textbooks sold

xz_007 [3.2K]

Answer:

208 history books

124 chemistry books

Step-by-step explanation:

Let a = total number of books

b = number of history books

c = number of chemistry books

a = b + c

We know that a is equal to 332 and c = b - 84

Let's substitute this value to our equation and solve for b first. Now we get:

332 = b + ( b - 84)

332 = 2b - 84

332 + 84 = 2b

416 = 2b

b = 208

Now we can solve for c

332 = 208 + c

332 - 208 = c

c = 124

Now let's check

a = 332

b = 208

c = b - 84 = 208 - 84 = 124

7 0

3 years ago

If < A and < B are a linear pair, and < A = 68 °, then < B = _____.

Contact [7]

Answer:

Option b, 112°

Step-by-step explanation:

<A+<B=180

or, 68+<B=180

or, <B=112

Answered by GAUTHMATH

5 0

3 years ago

Which set of side measurements could be a triangle? Select all that apply.

Mars2501 [29]

Answer:

B) 12yd, 24yd, 32yd is the answer

3 0

4 years ago

Find the slope using the formula LaTeX: \frac{y_2-y_1}{x_2-x_1}y2−y1x2−x1 (9, 10) and (7, 2)

guapka [62]

Answer:

<h2>slope = 4</h2>

Step-by-step explanation:

The formula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

We have the points (9, 10) and (7, 2).

Substitute:

$m=\dfrac{2-10}{7-9}=\dfrac{-8}{-2}=4$

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4 years ago

What is 150% of 3000? Round to the nearest hundredth

marin [14]

We want to find 150% of 3000. since 150% is greater than 100%, it is expected that 150% 0f 3000 will also be greater than 3000.

$150\text{\% of 3000 }=\frac{150}{100}\times3000=4500$

Therefore, 150% of 3000 is equal to 4500.

4 0

1 year ago