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3 years ago

I need someone to explain on how to do this problem.

Mathematics

2 answers:

weqwewe [10]3 years ago

5 0

Answer:

I think it's x=-12 for the buttom one

Step-by-step explanation:

I think when you get open equations like these you would asume 1 is there so rewrite it as 2x + 25 = 1

so take the 25 away from 1. to do that we need to do the opisite of +

2x + 25 = 1

1 - 25 = -24

rewrite

2x = -24

take the 2 away. oppisite of mulitplication is division. so divide 2 by -24

-24 divided by 2 = -12

Hope this helps! Please mark as brainliest! Thanks! If you need me to solve the top one too, I'll do it! Just comment bellow. :D

Alja [10]3 years ago

3 0

Because the two angles shown are vertical angles, they are equal to each other.
Thus, we can write an equation to solve the problem as 4x-15=2x+25.
Now solve.
Add 15 to both sides.
4x=2x+40
Subtract 2x from both sides.
2x=40
Divide both sides by 2 to isolate x.
X=20
Now that we know the value of x, we can use that knowledge to solve for the unknown angles.
Substitute 20 for x in both equations.
4(20)-15
80-15
65
2(20)+25
40+25
65
The top and bottom angles are both 65 degrees, and x is 20.
Hope this helps!

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3x + 4 = 5x - 12; x = 8 true or false?

Natalija [7]

Answer:

True.

Step-by-step explanation:

To find out if the statement is true, just plug in 8 each time you see x.

3(8)+ 4 = 28

5(8) - 12 = 28

This proves the statement is true, x = 8.

I hope this helps. If you have any more questions, please feel free to post them and someone will be able to help you, whether it's myself or others. Please leave a like, rating, and if possible, Brainliest. Have a great day!

7 0

3 years ago

Read 2 more answers

A committee of 9 members is voting on a proposal. Each member casts a yea or nay vote. On a random voting basis, what is the pro

dsp73

Answer:

The required probability is $P(x)=\frac{9}{128}$ or $P(x)=0.0703125$ .

Step-by-step explanation:

Consider the provided information.

A committee of 9 members is voting on a proposal. Each member casts a yea or nay vote. On a random voting basis,

The probability of yea or nay vote is equal, = $\frac{1}{2}$

So, we can say that $p=q=\frac{1}{2}$

Use the formula: $P(x)=\binom{n}{x}p^xq^{n-x}$

Where n is the total number of trials, x is the number of successes, p is the probability of getting a success and q is the probability of failure.

We want proposal wins by a vote of 7 to 2, that means the value of x is 7.

Substitute the respective values in the above formula.

$P(x)=\binom{9}{7}(\frac{1}{2})^7(\frac{1}{2})^{9-7}$

$P(x)=\frac{9!}{7!2!}(\frac{1}{2})^7(\frac{1}{2})^{2}$

$P(x)=\frac{8\times9}{2}\times(\frac{1}{2})^9$

$P(x)=\frac{4\times9}{2^9}$

$P(x)=\frac{9}{2^7}$

$P(x)=\frac{9}{128}$ or $P(x)=0.0703125$

Hence, the required probability is $P(x)=\frac{9}{128}$ or $P(x)=0.0703125$ .

4 0

3 years ago

Simplify this questions<br>6<br>---+15.4<br>5

sweet-ann [11.9K]

6/5 +15.4
12/10 +15.4
12/10+154/10
166/10
16.6

This can also be done by using the following method:
6/5 +15.4
12/10+15.4
1.2+15.4
16.6

Hope this helps :)

5 0

3 years ago

What is x and what are the steps I take to find X?

slega [8]

X is a variable to find it you need to isolate it(get it by itself)

3 0

3 years ago

What is the measure of the angle between a perpendicular bisector and the segment it is bisecting? A. 180° B. 90° C. 45° D. 0°

gregori [183]

If something is perpendicular to something else, it intersects it at 90 degrees. So, it there is a bisector perpendicularly bisecting a segment, it means they are crossing at a 90 degree angle. Your answer should be B.

6 0

3 years ago

I need someone to explain on how to do this problem.​

I need someone to explain on how to do this problem.