All categories

3 years ago

20 POINTS!!! NEED ALL 4 ANSWERED!!!

Mathematics

1 answer:

TEA [102]3 years ago

3 0

Answer:

1. x = 10 2. x = 7 3. x = 1 4. x = 6

Explanation:

1. -2x + 81 = 61 (Subtract 81 from 61)

-2x = -20 (Divide)

x = 10

2. 9x - 58 = 5 (Add 58 to 5)

9x = 63 (Divide)

x = 7

3. 21 +10x = 3x + 28 (Rearrange expression)

21 - 28 = 3x - 10x (Combine like terms)

-7 = -7x (Divide)

x = 1

4. 9x - 42 = 2x (Rearrange)

9x - 2x = 42 (Combine like terms)

7x = 42 (Divide)

x = 6

You might be interested in

Ram wants to work to preserve marine habitats. Which field of study would be most useful to him

Nataliya [291]

<span>Oceanography the others are other studies

</span>

8 0

3 years ago

Read 2 more answers

HELP WILL GET BRAINLIEST Select the correct answer.

irina [24]

Answer:

its 0.3

Step-by-step explanation:

i got it wrong bcuz i chose something else but trust me its 0.3

brainliest plz

8 0

3 years ago

Find the slope and y intercept

zepelin [54]

Answer:

slope = -1

y intercept (0,-2)

Step-by-step explanation:

We can use the two points to find the slope

(-4,2) and (1,-3)

m = ( y2-y1)/(x2-x1)

= (-3 -2)/(1 - -4)

= -5 /(1+4)

= -5/5

- 1

The y intercept is where it crosses the y axis

y intercept is (0,-2)

5 0

3 years ago

PLEASE HELP

irina [24]

Answer:

$12\sqrt{3}$ feet

Step-by-step explanation:

In a 30-60-90 triangle, the ratios of the side lengths of the triangle is $1:\sqrt{3} :2$

Where 1 is the shortest leg, root(3) is the longer leg, and 2 is the hypotenuse.

First we can set x equals to the length of the original pole, and so the shorter leg has a length of x/3 and using the ratio of side lengths, we can find that:

$\frac{x}{3} * \sqrt{3} = \frac{\sqrt{3} x}{3} = 12$

Solving for x, we find that

$x=\frac{36}{\sqrt{3} } = \frac{36 * \sqrt{3} }{\sqrt{3} * \sqrt{3} } = \frac{36 \sqrt{3} }{3} = 12\sqrt{3}$

So the length of the original pole would be $12\sqrt{3}$ feet

If you found this answer helpful, please consider marking it as brainliest, or give it a thanks and a 5 star review. Thanks!

6 0

3 years ago

5m - 4n, when m=5 and n = 3.

tiny-mole [99]

Answer:

5m - 4n

5(5) - 4(3) ( As m= 5 and n= 3)

25 - 12

= 13

8 0

3 years ago

Read 2 more answers