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3 years ago

Pls help for this pre calc question 25 points rewarded!

Mathematics

1 answer:

Temka [501]3 years ago

3 0

Let's check the dot product .

v.w = 5(4)-2(10) = 20 -20 =0

So the dot product is not 20 . And since the dot product is zero, so they are perpendicular.

And the y component of w is 10.

So correct options are first and third .

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Quincy wants to go to the movies with his friends

Minchanka [31]

Answer:

2a+3b+5=20

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

The quotient of a number and -5 increased by 1 is at most 7

Vesnalui [34]

X/-5 +1 (is less than or equal to) 7
I can't paste the less than or equal to sign but it's < with a line underneath

6 0

3 years ago

.Shaun estimated that the attendance at a college

Serggg [28]

Answer:

38.72%

Step-by-step explanation:

Estimated attendance = 1,000

The actual value of attendance = 1,632

We need to find the percent error of Shaun's estimate. Using the formula as follows :

$\%=\dfrac{|\text{actual value-estimated value}|}{\text{actual value}}\times 100$

Put all the values,

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So, the percent error of Shaun's estimate is 38.72%.

8 0

2 years ago

Factor the quadratic by checking factor pairs.<br> -15x2 – 21x + 18<br> -15x2 – 218 + 19 = -3

d1i1m1o1n [39]

Answer:

-3(x + 2)(5x - 3)

Step-by-step explanation:

-15x² – 21x + 18

-3(5x² + 7x - 6)

-3[5x² + 10x - 3x - 6]

-3[5x(x + 2) - 3(x + 2)]

-3(x + 2)(5x - 3)

3 0

3 years ago

Make b the subject of the formula <br><img src="https://tex.z-dn.net/?f=k%20%3D%20%20%5Cfrac%7Bbrt%7D%7Bv%20-%20b%7D%20" id="Tex

balu736 [363]

Answer:

b = $\frac{kv}{k+rt}$

Step-by-step explanation:

Given

k = $\frac{brt}{v-b}$ ← multiply both sides by (v - b)

k(v - b) = brt ← distribute left side

kv - kb = brt ( subtract brt from both sides )

kv - kb - brt = 0 ( subtract kv from both sides )

- kb - brt = - kv ( multiply through by - 1 to clear the negatives )

kb + brt = kv ← factor out b from each term on the left

b(k + rt ) = kv ← divide both sides by (k + rt )

b = $\frac{kv}{k+rt}$

5 0

2 years ago