2 years ago

7th grade math help me please :((

Mathematics

1 answer:

yKpoI14uk [10]2 years ago

6 0

Answer:

it is equivelant

Step-by-step explanation:

y=3 would mean,

8(3)+7+2(3)+11=48

10(3)+18=48

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Simplify The expression <br> -5/8 (-3/8 - 1/4)

dusya [7]

Answer:

25/64

Step-by-step explanation:

do what's inside parentheses first

-3/8 - 2/8 = -5/8

-5/8(-5/8) = 25/64

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2 years ago

Consider the function f(x)=x3+15x2+74x+120. If f(x)=0 for x=−6, for what other values of x is the function equal to 0? List the

jasenka [17]

Answer:

other x values are -5,-4

Step-by-step explanation:

f(x)=0 for x=−6

Apply synthetic division to get the quotient . using that we find other two values of x

-6 1 15 74 120

0 -6 - 54 -120

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1 9 20 0

the quotient is $x^2+9x+20=0$

now factor the left hand side, product is 20 and sum is 9

$x^2+9x+20=0\\(x+5)(x+4)=0\\x+5=0 , x=-5\\x+4=0, x=-4$

So other x values are -5,-4

8 0

2 years ago

Find the equation of the line with slope 1/3 and y interception (0,-2)

Andreyy89

Answer:

y=(1/3)x-2

Step-by-step explanation:

Plug into equation of y=mx+b

y=(1/3)x-2

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2 years ago

1. Find a if x³ + ax² - x -8 is divisible by x -1

Amanda [17]

Answer:

a = 8

Step-by-step explanation:

x-1 = 0

x = 1

let x³ + ax² -x -8 be p(x)

hence, p(1) = (1)³ + a(1)² -1 -8 = 0 (since, x-1 is a factor)

= 1 + a - 1-8

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therefore, a = 8

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2 years ago

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Marina86 [1]

Answer:

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Step-by-step explanation:

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2 years ago