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3 years ago

Math algebra pls help asap evaluate

Mathematics

2 answers:

Ugo [173]3 years ago

7 0

Answer:

A. 10

B. -8

C. 16

Step-by-step explanation:

A. -6x-2 = -6(-2)-2 = 10

B. -6x-2 = -6(1)-2 = -8

C. -6x-2 = -6(3)-2 = 16

Radda [10]3 years ago

5 0

10, -8, 16 is your answers!

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PLZ help me fast 2 mins left

jek_recluse [69]

Answer:

$\sqrt{-5}=i\sqrt{5}$

$\sqrt{-25}=5i$

Step-by-step explanation:

i is an imaginary unit, this means

$i^2=-1$

Rewrite -5 as $5\cdot (-1)=5\cdot i^2,$

then

$\sqrt{-5}=\sqrt{5i^2}=\sqrt{5}\cdot \sqrt{i^2}=\sqrt{5}\cdot i=i\sqrt{5}$

Rewrite -25 as $-25=25\cdot (-1)=25\cdot i^2,$

then

$\sqrt{-25}=\sqrt{25\cdot i^2}=\sqrt{25}\cdot \sqrt{i^2}=5\cdot i=5i$

6 0

3 years ago

Question is below (wasn't sure about the answer)

Paha777 [63]

Answer: Choice A)

$H = \frac{SA}{2(L+W)} - \frac{LW}{L+W}\\\\$

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Work Shown:

$SA = 2(LW + LH + HW)\\\\2(LW + LH + HW) = SA\\\\LW + LH + HW = \frac{SA}{2}\\\\LH + HW = \frac{SA}{2} - LW\\\\H(L + W) = \frac{SA}{2} - LW\\\\H = \frac{\frac{SA}{2} - LW}{(L + W)}\\\\H = \frac{SA}{2(L+W)} - \frac{LW}{L+W}\\\\$

This is not the only way to solve for H.

3 0

3 years ago

What is 18.248287 rounded to the nearest tenth? <br>

ycow [4]

Answer:

18.248287

8.2

Step-by-step explanation:

7 0

3 years ago

A sum of money is deposited at a bank at a rate of 12½ annum simple interest. In how many years would the deposited money be dou

Dmitrij [34]

Answer:

It would take 10 years for the given sum of money be doubled at the given simple interest rate.

Step-by-step explanation:

A 10% interest would be added to the the principal amount after each year. So the interest would reach 100% i.e. equal to the principal amount in 10 years.

7 0

3 years ago

Fill in the blank to make the expression a perfect square.. . u^2-16u+?

hram777 [196]

U² - 16 u + 64 = ( u - 8 )²
because: A² - 2 A B + B² = ( A - B )²
Answer: 64

8 0

3 years ago