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3 years ago

12

In a mixture of concrete, there are five lb of cement mix for each pound of gravel. if the mixture contains a total of 198 lb o

f these two ingredients, how many pounds of gravel are there?

1 answer:

arsen [322]3 years ago

7 0

There are 39.6 lbs. of gravel.

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Factor a 3 - 3 + 3a 2 - a.

Troyanec [42]

(a - 1)(a + 1)(a + 3)

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3 years ago

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Answer correctly please !!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!!

valina [46]

Answer:

74º

Step-by-step explanation:

Ray TV bisects ∠RTS, so ∠RTV=∠STV=(16x-6)º
We also know that ∠RTS=(26x+18)º
So, (16x-6)º+(16x-6)º=(26x+18)º
We don't need parenthesis, 16x-6+16x-6=26x+18
Combine like terms, 32x-12=26x+18
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Subtract, 6x=30
Divide, x=5
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3 years ago

A classmate estimated square root of 397 to be about 200 explain the mistake and correct it

Arturiano [62]

They probably thought square rotting was dividing by 2. The correct answer is about 20

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3 years ago

Question 2 please fas

Len [333]

Answer:

a = 3, b = 2

Step-by-step explanation:

It is given that both the polynomials are equal.

Therefore, h(x) = k(x)

${x}^{3} + (a + b) {x}^{2} - 4x + 2 \\ = {x}^{3} + 5 {x}^{2} - (2a - b)x + 2 \\ \\ equating \: like \: terms \: on \: both \: sides \\ (a + b) {x}^{2} = 5 {x}^{2} \\ \implies \: a + b = 5.....(1) \\ \\ - (2a - b)x = - 4x \\ 2a - b = 4....(2) \\ \\ adding \: equations \: (1) \: and \: (2) \\ \\ 3a = 9 \\ \implies \: a = \frac{9}{3} \\ \huge \red{ \boxed{\implies \: a = 3}} \\ \\ substituting \: a = 3 \: in \: equation \: (1) \\ 3 + b = 5 \\ \implies \: b = 5 - 3 \\ \huge \purple{ \boxed{ \implies b = 2}}$

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3 years ago

0.5 (2x + 2) = -4<br><br> Solve for x.

Ivanshal [37]

0.5(2x+2)=-4

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2x+2=-8

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Divide by 2 on both sides

x=-5

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3 years ago

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