MATHEMATICS MIDDLE SCHOOL

If f(x) = 3x^2 - 2x + 5, find f(-2) A. f(–3) = 3
B.f(–3) = 6
C.f(–3) = 9
D.f(–3) = 12

Answers

Answer 1
Answer:

Answer:

Step-by-step explanation:

hello :

If f(x) = 3x² - 2x + 5,

f(-2)=3(-2)² - 2(-2) + 5=12+4+5=21

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Mark's age is, t, is 3 times his age 10 years ago. Write an equation to represent the statement.

Answers

t=3(10)

this is the answer because you are trying to find out what t is

but u know that he is 3 times his age 10 years ago

Is the number rational or irrational?square root 48
square root 9
square root 39
square root 289

Answers

1. irrational: √48 = 6.92820323028

2. rational: √9 = 3

3. irrational: √39 = 6.2449979984

4. rational: √289 = 14

Answer:

1) Irrational: √48 = 6.92820323028!

2) Rational: √9 = 3!

3) Irrational: √39 = 6.2449979984!

4) Rational: √289 = 14!

Step-by-step explanation:

What does mean, median, mode, and the other word mean

Answers

Mean: add all the numbers and divide by the number of numbers
    so if I had 1, 2, 2, 3, 4, I would add all of them together and get 12 then divide 12 by 5 because there are 5 numbers to get a mean of 2.4

Median: the middle number in a set
     in the set 1,  2,  2,  3,  4 the median would be 2 as it is in the exact middle of the set of numbers. ***Be careful! For this, the numbers HAVE to be in numerical order so it has to be 1, 2, 2, 3, 4   NOT something like 1, 2, 3, 2, 4

Mode: the number that appears the most in a set
     in the example 1, 2, 2, 3, 4  the mode is 2 because 2 appears more than the other numbers

Hope this helped!! 

so mean is when you add all the number you have and divide it how many number.

example: 1,4,5.6 if you add all the numbers the answer will be 16 and divide it 4 so you count how many number you have so 16 divide by 4 = 4.

the median is the one that are in the middle . to find it you have to place the number to least to greater and find the median.

Example:     4,6,10.5,3,1,8

so least to greater will be 1,3,4,5,6,8,10.  so when you count the median will be 5 because you count 1,3,4 and you count 6,8,10 so the middle is 5.

the mode is the number that occurs most often in the number like this

Example: 1,2,3,3,4,5, so the number that occurs most often is 3 .

I don’t which one it is?

Answers

Answer:

7.351

I don't know how they have rounded; the closest answer is A

Step-by-step explanation:

The only way I know to do this is with the cos law

y^2 = x^2 + z^2 - 2*x*z cos(Y)

x = 22

z = 16

y = ?

I have serious doubts that this will make a triangle. I ran it though a calculator and it does work -- surprise for me. Substitute the givens.

y^2 = 256 + 484 - 2*10*22*cos(13)

y^2 = 740 - 704*cos(13)

y^2 = 740 - 704*0.9744

y^2 = 740 - 685.95

y^2 = 54.05                                       Take the square root of both sides

y = √54.05

y = 7.351

Answer:

7.4

Step-by-step explanation:

The information given is in from SAS.

This is a job for law of cosines.

This is the law of cosines a^2=b^2+c^2-2bc cos(A)

The angle A is opposite side a and b,c are the other sides.

So 13 degrees is opposite the y there.

y^2=16^2+22^2-2(16)(22)\cos(13)

Now I'm going to put 16^2+22^2-2*16*22*cos(13) in my calculator:

y^2=54.04347439

Now one more step. To get rid of the square, you need to square root both sides:

y=√(54.04347439)=7.351426691

Sp the answer is approximately 7.4

14 is what percent of 56?

Answers

let the what be x
56%* x=14
x= 14/56%
x= 25%

The solution of the number for the given condition x% of 56 is the number 14 is 4%

Used the concept of percentage which states that,

A number or ratio that can be expressed as a fraction of 100 or a relative value indicating the hundredth part of any quantity is called a percentage.

Given that,

The x% of 56 is the number 14.

Now, we can write a mathematical expression as,

x% of 56 is 14.

14 = (x)/(100) * 56

Multiply both sides by 100,

14 * 100 = 56x

56x = 1400\n

x = (56)/(14)

x = 4

So, we get;

4% of 56 = 14

To learn more about the percentage visit:

brainly.com/question/24877689

#SPJ6

Tom's Tent Rental charges a flat rate of $100 per day plus $10 for each hour the tent is used. If the number of hours is represented by "h," which algebraic expression represents the overall rate for the day using "h"?100 + 10h
10h
100 + h
90h

Answers

Simple..

writing in y=mx+b form...

it's charging you $100 already... +10 for each hour used....

y=10h+100
or
y=100+10h

Thus, your answer.
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