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d1i1m1o1n [39]
3 years ago
8

Evaluate 7j+5-8k when j=0.5 and k=0.25

Mathematics
2 answers:
dlinn [17]3 years ago
6 0

So first you would substitute j and k in the expression.

7(0.5)+5-8(0.25)

3.5+5-2

It would equal 6.5

Hope this helps!

lions [1.4K]3 years ago
3 0

Hey there! Welcome to Brainly!

Let's plug in our values and evaluate.

7(0.5)+5-8(0.25)

3.5+5-2

8.5-2

6.5

Therefore, our answer is 6.5

I hope this helps! Have a great time here at Brainly!

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If y=15 and x=-9 what is the new value of y
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Find k if (x+1) 2x^3+kx^2+1
Viktor [21]
<h2>Question:</h2>

Find k if (x+1) is a factor of 2x³ + kx² + 1

<h2>Answer:</h2>

k = 1

<h2>Step-by-step explanation:</h2>

The factor of a polynomial F(x) is another polynomial that divides evenly into F(x). For example, x + 3 is a factor of the polynomial x² - 9.

<em>This is because;</em>

i. x² - 9 can be written as (x - 3)(x + 3) which shows that both (x - 3) and (x + 3) are factors.

ii. If x = -3 is substituted into the polynomial x² - 9, the result gives zero. i.e

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Therefore, if (x + a) is a factor of a polynomial, substituting x = -a into the polynomial should result to zero. This also means that, if x - a is a factor of a polynomial, substituting x = a into the polynomial should give zero.

<em><u>From the question</u></em>

Given polynomial: 2x³ + kx² + 1

Given factor: x + 1.

Since x + 1 is a factor of the polynomial, substituting x = -1 into the polynomial should give zero and from there we can calculate the value of k. i.e

2(-1)³ + k(-1)² + 1 = 0

2(-1) + k(1) + 1 = 0

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Julli [10]
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4 0
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Answer:

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