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mestny [16]
3 years ago
5

PLEASE HELP !!!! ILL GIVE BRAINLIEST !!!

Mathematics
1 answer:
Nastasia [14]3 years ago
7 0

Answer:

1. Congruent

2. They are vertical angles

3. 12x-18=8x+10

4. x = 7

Step-by-step explanation:

It’s simple math for me but all the answers above should be correct...

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What point will y+4x=-24 and x=3y-45 intersect
rewona [7]
Solve as simultaneous equations or substitute for the x or y value, and then get the other x or y value by substituting.

Substitution method:

y + 4x = -24
x = 3y - 45

Substitute the x into the first equation.

y + 4 (3y-45) = -24

Simplify and solve for y

y + 12y - 180 = -24
13y = -24 + 180
13y = 156
y = 12

Substitute y into one of the equations to find the x value.

x = 3(12) - 45
x = -9

(-9,12) is where the lines intersect.
7 0
3 years ago
A fair spinner has 9 equal sections: 3 red, 4 blue and 2 green. It is spun twice. What is the probability of getting not green t
mestny [16]
2 over 9 because if you see there are 3 red and 4 blue
4 0
3 years ago
A consumer advocacy group tested the "on-air" lifetimes a random sample of 241 cell phone batteries. The mean lifetime was 3.2 h
snow_tiger [21]

Using the Empirical Rule, it is found that 229 batteries have lifetimes between 3.0 hours and 3.4 hours.

--------------------------

By the Empirical Rule, in a normal variable: 68% of the measures are within 1 standard deviation of the mean, 95% are within 2 and 99.7% are within 3.

--------------------------

  • Mean of 3.2 hours with a standard deviation of 0.2 hours.

3 = 3.2 - 2(0.1)

3.4 = 3.2 + 2(0.1)

  • Thus, between 3 and 3.4 hours is <u>within 2 standard deviations of the mean</u>, which is 95%.
  • Out of 241 batteries: 0.95(241) = 229

229 batteries have lifetimes between 3.0 hours and 3.4 hours.

A similar problem is given at brainly.com/question/24552083

4 0
3 years ago
What property of multiplication do we use to find equivalent fractions?
andrezito [222]
I think it's the communitive property
4 0
4 years ago
The surface area of a cylinder
Ganezh [65]

The formula for the surface area of a cylinder is \pi r (r + h), where r stands for the radius of the base of the cylinder, and h stands for the cylinder's height.

7 0
4 years ago
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