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Setler [38]
3 years ago
14

5x^2 -15x-140 what method should be use?

Mathematics
1 answer:
elena55 [62]3 years ago
8 0
5x^2 -15x-140

5(x² -(3x) -28)

5(x² +(4x-7x)-28)

5(x(x+4) -7(x+4)

5(x-7)*(x-4)



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Hello I need help with this question
sergejj [24]

2)   x + 1/4 = 7/8

         -1/4     -1/4

     x = 5/7

3)   3/4x = 5/8

     *4/3     *4/3

      x = 5/6

Hope this helps! ;)

7 0
3 years ago
Find the value of x.
DENIUS [597]

Answer:

9+grab is the answer

Step-by-step explanation:

gseeyzbtjcd

4 0
3 years ago
1. The hypotenuse of a right triangle measures 2 sqrt 15 centimeters and its shorter leg measures 2 sqrt 6
Dominik [7]

Answer:

<h2>50.8°</h2>

Step-by-step explanation:

First, we need to use the Pythagorean Theorem to find the third side. We will then use the law of cosines to find the angle.

2√15² = 2√6² + b²

60 = 24 + b²

Subtract 24

36 = b²

b = 6

Now, that we have all three sides, we will use the law of cosines to figure out the angle.

c² = a² + b² - 2abCosC°

Substitute the values in.

6² = 2√15² + 2√6² - 2(2√15)(2√6)CosC°

36 = 60 + 24 - 2(37.947331922)CosC°

36 = 60 + 24 - 75.894663844CosC°

36 = 84 - 75.894663844CosC°

Subtract 84

-48 = -75.9CosC°

0.63241106719 = CosC°

Arccos (0.63241106719) = 50.77176844°

The largest acute angle is approximately 50.8°

8 0
3 years ago
Read 2 more answers
This look at pic I need number 22
kupik [55]
I THINK THAT IT IS (A)
3 0
3 years ago
which number correctly completes this equation 3/4%x75= A. 0.255 B. 0.5625 C. 2.55. D. 5.626
timofeeve [1]
3/4% × 75

3/4 of a percent is .0075.

0.0075 times 75 = 0.5625

The answer is B) 0.5625.
5 0
3 years ago
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