MATHEMATICS HIGH SCHOOL

How to determine if these two function are linear or not1. 2x+y=4

2.2+y=3
x 4 2

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Answer 1
Answer: first you have to see if they an be simplified into a y=mx+b formula. then make sure they have a constant (aka slope), and a y-intercept(some equations dont have this)  

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PLEASE HELP 15 POINTSAn item costs $420 before tax, and the sales tax is $16.80 .Find the sales tax rate. Write your answer as a percentage.

Five more than four times a number is greater than seven​

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Answer:

5+ 4x > 7, x > 1/2

Step-by-step explanation:

Add an explanation on how to get the right answer and I will give out Brainliest

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Answer:

=439.04 ft^2

Step-by-step explanation:

First find the area of the total rectangle

A = l*w

40*16 =640 ft^2

We have 2 semi circles with diameter 16

That equals 1 circle with diameter 16

The radius is d/2 = 16/2 =8

The area of a circle is

A = pi r^2

A = (3.14) (8)^2

  =200.96

Subtract the unshaded area from the total area

640-200.96=439.04

Which expression represents "the sum of 3 and n"a. n + 3
b. n3
c. 3n
d. n + n + n

Answers

  Answer:

Option (a) is correct.

n + 3 represents the given expression "the sum of 3 and n" correctly.

Step-by-step explanation:

Given : Expression "the sum of 3 and n"

We have to choose the correct option from the given options that represents the given expression "the sum of 3 and n" correctly.

Consider the given expression "the sum of 3 and n"

We know the mathematical symbol for sum is '+'

So, The sum of 3 and n is written mathematically as 3 + n

Thus,  n + 3 represents the given expression "the sum of 3 and n" correctly.
The answer would be A, yet if this was for homework or a test, you would write it out as "3 + n".

Marguerite drew a rectangle with vertices A(-2,-1) B(-2,-4) and C (1,-4) what are the coordinates of the fourth vortex?

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Concept:

we use the vector method to solve this problem, take all the vertices in vector foam.

In the rectangle their exist two pair of parallel and equal sides, take the one pair and solve for unknown vertex.

BA=CD

A-B = D-C

(-2i-j)-(-2i-4j) = (xi+yj)-(1i-4j)

(-2i-j+2i+4j) = (xi+yj-1i+4j)

3j = xi+yj-1i+4j

i+3j-4j = xi+yj

1i-1j= xi+yj

by comparing,

x= 1

y= -1

so D vertex is (1, -1)
The fourth vortex is (1, -1)

Evaluate - 13=-3x+ 4x+10

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Answer:

-23

Step-by-step explanation:

-13-10=-3x+4x

-23=1x

-23 divided by 1=-23

A cherry blossom tree grows 2 inches per year. A cherry blossom tree is 28 currently inches. How tall, in inches, will the cherry blossom tree be in 13 years?​

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