3 years ago

I need the answers to 9-12! Tysm!

Mathematics

1 answer:

loris [4]3 years ago

3 0

Answer:

9) 5y

10) 10 x² - 4

11) 2a ∧5 + 5b

12) 8m +4n + 2

Step-by-step explanation:

9) 8 y - 3 y = 5y

10) 6x² + 4 (x²-1) = 6x²+ 4x²-4 = 10x²-4

11) 4a∧5 - 2a∧5 +4b + b = 2a∧5 +5b

12) 8m +14-12+4n = 8m+4n+2

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Find the product.<br> a 4(3a2 - 2a + 1)<br><br> (typed answers not selection)

Rus_ich [418]

Answer:

$3a^6-2a^5+a^4$

Step-by-step explanation:

Use the rules of indices to find the product.

One of the rules is that when we multiply indices that have the same base we add the powers. For example:

$x^4 * x^5 = x^9$

So to work out $a^4(3a^2-2a+1)$ we need to follow this rule.

Let's expand the bracket:

$a^4(3a^2-2a+1) = (a^4)(3a^2)+(a^4)(-2a)+(a^4)(1)$

Let's simplify keeping in mind the rule we know.

$(a^4)(3a^2)=3a^6$

$(a^4)(-2a) = -2a^5$ - remember that $a = a^1$

$(a^4)(1) = a^4$

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3 years ago

soybean meal is 16% protein; cornmeal is 8% protein. how many pounds of each should be mixed together in order to get 320-lb mix

nlexa [21]

Answer:

120 lb of soybean meal

200 lb of cornmeal

Step-by-step explanation:

S = pounds of soybean meal

C = pounds of cornmeal

S + C = 320 → C = 320 – S

0.16S + 0.08C = 0.11 × 320 = 35.2

16S + 8C = 3520

16S + 8(320 – S) = 3520

16S + 2560 – 8S = 3520

8S + 2560 = 3520

8S = 960

S = 120

C = 320 – 120 = 200

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3 years ago

What is the answer to 2m-6=48

sveticcg [70]

2m=48+6
m=(48+6)/2
m=27

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The answer is B. 6.5f+2.5 because 13/2 is 6.5 and 5/2 is 2.5

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2 years ago

Edward has a piece of fabric that is 5 feet long. The fabric needs to be cut into 3 equal length pieces. How many feet long shou

raketka [301]

You would divide 5 by 3
5/3=1.667 feet

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3 years ago

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