4 years ago

2(x − 7) + (8x + 20)

Mathematics

1 answer:

Angelina_Jolie [31]4 years ago

5 0

Answer:

your answer should be 10x+6

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Determine the missing exponent<br>2^5=1/4

Alinara [238K]

Answer:

false

Step-by-step explanation:

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3 years ago

If x = 1 is a zero of the polynomial function f(x) = 3x3 − 8x2 + 3x + 2, which of the following is another zero of f(x)?

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Divide 3x^3 -8x^2+3x + 2 by (x - 1)

THis gives the quotient 3x^2 - 5x - 2

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Its the first choice

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What is the projection of (2,6) onto (-1,5)?

kvv77 [185]

Answer: Projection of (2,6) onto (-1,5) is given by

$\dfrac{28}{\sqrt{26}}$

Step-by-step explanation:

Let $\vec{a}=2\hat{i}+6\hat{j}$

and $\vec{b}=-1\jhat{i}+5\hat{j}$

we need to find the projection of $\vec{a}$ onto $\vec{b}$

As we know the formula for projection:

$Projection=\frac{\vec{b}}{\mid b\mid}. \vec{a}$

Since we know the value of $\vec{b}=-1\jhat{i}+5\hat{j}$

so,

$\mid b\mid=\sqrt{(-1)^2+(5)^2}\\\\\mid b\mid=\sqrt{1+25}\\\\\mid b \mid=\sqrt{26}$

so, $\dfrac{\vec{b}}{\mid b\mid}=\dfrac{-1\hat{i}+5\hat{j}}{\sqrt{26}}$

Now, it becomes,

$Projection=\dfrac{(2\ht{i}+6\hat{j}).(-1\hat{i}+5\hat{j})}{\sqrt{26}}\\\\Projection=\dfrac{-2+30}{\sqrt{26}}\\\\Projection=\dfrac{28}{\sqrt{26}}$

Hence, projection of (2,6) onto (-1,5) is given by

$\dfrac{28}{\sqrt{26}}$

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3 years ago

Round each number to the underline place value 3.789 seven being underline

kvasek [131]

Answer:

Step-by-step explanation:

the 7 is over 5 which makes the 3 round to a 4

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3 years ago