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3 years ago

Please help, I’ll give brainliest, thumbs up, 5 stars!!!

Mathematics

1 answer:

Zina [86]3 years ago

3 0

Answer:

1. 63.64

2. 54 in

3. 18 in

4. 20.25

5. 168

6. 6 cm

Step-by-step explanation:

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SIMPLIFY (x + 5)(2x - 6) A) 2x2 - 30 B) 2x2 - 6x C) 2x2 + 7x - 6 D) 2x2 + 4x - 30

alina1380 [7]

Answer:

D) 2x²+4x-30

Step-by-step explanation:

You would multiply x and 2x; x and -6; 5 and 2x; 5 and -6

(x)(2x) = 2x²

(x)(-6) = -6x

(5)(2x) = 10x

(5)(-6) = -30

Now just put it back in the order that it was listed in the equation starting with (x)(2x)

This would give you 2x²-6x+10x-30

Simplify even further to get 2x²+4x-30

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3 years ago

Read 2 more answers

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miskamm [114]

Throughout this, I'm assuming that the scale is: 1 square = 1

Not 100% sure if my answers are correct.

Question 1:

The x coordinate must be 2 and the y coordinate must be -1.

Question 2:

The x coordinate would be -2 and the y coordinate would be -1.

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2 years ago

What is the square root of 5

zlopas [31]

The square root of 5 is 2.236

7 0

3 years ago

QUICKK EXPERTS/ACE/GENIUSES ( question #2 )

kiruha [24]

180 - 90 -18 = 72

Answer is D 72 degrees

3 0

3 years ago

Plz help with the math worth 21 points

irinina [24]

Answer:

As there is one math problem over there.

Lets see the question first:

It says that "A hair dryer is rated $1200\ W$ ,if you use the dryer for $0.25\ h$ .How much electric energy do you use ?"

Final answer = Electic energy $=0.3\ kW\ h$

Step-by-step explanation:

Electrical Energy $E=Power \times time$ .

The total amount of electrical energy used depends on the total power used by the electrical device and the total time they are used for.

So we have been given the power of the hair dryer $=1200\ W =\frac{1200}{1000}=1.2\ kW$

Now the time it has been use for $=0.25\ hrs$

To calculate electric energy we will multiply both the terms.

Electric energy $=0.12 \times 0.25 =0.3\ kW\ h$

So electric energy used for the hairdryer is = $0.3\ kW\ h$

7 0

3 years ago