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LiRa [457]
3 years ago
9

If a =3x^2+5x-6 and b =-2x^2 -6x+7 then A - B equals

Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
3 0

Answer:

5x^2+11x-13

Step-by-step explanation:

a=3x^2+5x-6\\b=-2x^2-6x+7

a-b=(3x^2+5x-6)-(-2x^2-6x+7)=\\3x^2+5x-6+2x^2+6x-7=\\5x^2+11x-13

Hope this helps!

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F(x) = 3(х + 2)<br> f(-3) =<br> о аз<br> Oь -7<br> Ос 7<br> W
choli [55]

Answer:

The value of f(-3) = -3

Step-by-step explanation:

It is given that f(x) = 3(x+2), in order to find f(-3), we have to substitute x = -3 into the function, f(x) :

f(x) = 3(x+2)

f(-3) = 3(-3+2)

= 3(-1)

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5 0
3 years ago
Clark has a box of nickels and dimes that totals $1.90. there are a total of 27 coins. how many nickels and dimes does he have?
Andrej [43]
$0.05(n) + $0.10(d) = $1.90
n + d = 27
n + d - d =27 - d
n = 27 - d

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1.35 - 0.05d + 0.10d = $1.90
1.35 +0.05d = $1.90
1.35 - 1.35 +0.05d = $1.90 -1.35
0.05d = 0.55
0.05d/0.05 = 0.55/0.05
d = 11

n = 27 - 11
n = 16

$0.05(16) + $0.10(11) = $1.90
$0.80 + $1.10 = $1.90
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4 0
3 years ago
-1/2(2x-6)+9=-8 answer
Oxana [17]

Answer:

x= 20 i think sorry if it's wrong⊙﹏⊙

5 0
3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

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Step-by-step explanation:

2.99/12 aprrox. equals 25 cents

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