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3 years ago

Evaluate 4(a+ 2b) - 2b when a = 2 and b = -2.

Mathematics

1 answer:

Evgen [1.6K]3 years ago

4 0

-8

4(2+2(-2))

distribute : 8 + -16

add: -8

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Help, i've been trying for around 30mins and I can't figure it out.

omeli [17]

Answer:

<h2>Option A and C</h2>

Step-by-step explanation:

As,

$2 \sqrt{75} + 3 \sqrt{50}$

$= 2 \sqrt{25 \times 3} + 3 \sqrt{25 \times 2} (A)$

$= 2 \times 5 \sqrt{3} + 3 \times 5 \sqrt{2}$

$= 10 \sqrt{3} + 15 \sqrt{2} (C)$

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3 years ago

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19. The bases of a trapezoid are 8 and 22 and the trapezoid's area is 135. Find the height

julia-pushkina [17]

Answer: 9

Step-by-step explanation:

A=(a+b)/2 *h

135= 30/2* h

135= 15 * h

135/15= h

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8 0

3 years ago

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If 35.4067=3/p+5/q+4r+6/s+7t, then the value of 2p+4q+5r+7s+3t

sweet [91]

Answer:

7004.7003

Step-by-step explanation:

We are given the following information in the question:

$35.4067=\displaystyle\frac{3}{p}+\frac{5}{q}+4r+\frac{6}{s}+7t$

We know that,

$35.4067 = (3\times 10^1) + (5\times 10^0) + (4\times 10^{-1})+(0\times 10^{-2}) + (6\times 10^{-3}) + (7\times 10^{-4})$

Comparing the two equations, we get:

$\displaystyle\frac{1}{p} = 10^1\\\\p = 10^{-1}\\q = 10^0\\r = 10^{-1}\\s = 10^3\\t = 10^{-4}$

We have to evaluate:

$2p+4q+5r+7s+3t$

Putting values, we get:

$(2\times 10^{-1}) + (4\times 10^0) + (5\times 10^{-1}) + (7\times 10^3) + (3\times 10^{-4})\\=0.2 + 4 + 0.5 + 7000 + 0.0003\\=7004.7003$

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3 years ago

How many integers satisfy -4 ≤ 2x + 1 ≤ 6?

andrey2020 [161]

I think there are 3 integers!
Hope this Helps!!

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3 years ago

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Can someone please help me

vitfil [10]

Answer:

x squared, i dont know how to do the lil 2 on a computer lolz

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3 years ago