MATHEMATICS HIGH SCHOOL

Translate the statement into an equation. Then solve the equation. The sum of 8 and 3 times a number is 23.

Answers

Answer 1
Answer: The best way to solve this is to write it out part by part. 

The first part is "the sum of 8 and 3," which is (8+3)

The second part is "...times a number," so we have n(8+3)

Lastly, "...is 23," means n(8+3) = 23, so here's the equation. In order to solve for n, divide both sides by (8+3) so 23/(8+3) which is 23/11. So the "number" is 23/11. 
Answer 2
Answer: Let the number be x
8+3x=23
3x=23-8
3x=15
x=5
The number is 5

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Can some one help me
2x+y=4
Y=2/3x-4

Answers

so you subsitute y=2/3x-4 for y in 2x+y=4 so
2x+(2/3x-4)=4
2x+2/3x-4=4
add like terms
2 and 2/3x-4=4
add 4 to both sidees
2 and 2/3x=8
   2 and 2/3=6/3+2/3=8/3
8/3x=8
multiply both sides by 3/8 (makes 8/3=24/24=1/1=1)
x=(3*8)/8
simplify
x=3
subtitute x=3 into y=2/3x-4
y=2/3(3)-4
y=(6/3)-4
y=2-4
y=-2

andrew is a public health nurse and has noticed that the birth rate in one small area has been declining. Predict the number of births in year 5? 720,360,180,90,?

Answers

Can you provide me with the current birth rate at that area?

How many sides does a hexagon have?
A. 5
B. 6
C. 7
D. 8

Answers

A pentagon has 5 sides.
A hexagon has 6 sides.
A heptagon has 7 sides.
An octagon has 8 sides.

A hexagon has 6 sides.

Your final answer is B. 6.
An Hexagon Has Six Sides. So B.

Find the nth term of this sequence: -1, 3, 7, 11, 15

Answers

This equation adds on by 4.
19
23
27
31
31 is the 9th term.

Six years after a tree was planted, its height was 7 feet. Nine years after it was planted, its height was 16feet. Which of the following equations gives the heighty, in feet, of the tree after x years if the tree grows at
a constant rate? Check all of the boxes that apply.
y - 6 =3(x - 10)
y-16 = 3(x-9)
y = 3x - 11
y=-3x - 23

Answers

I'm not good in this but.....

x = years

9x-6x = 16-7

3x = 9

x = 3

That means the tree will grow three feet per year.

tara has a rectangular lot measures 88 ft by 91 ft and wishes to use fencing to enclose the garden. how much fencing does she need?

Answers

fencing means parameter and as parameter of rectangle is equal to sum of lengh and width multiply 2
now parameter=2×91+88
=2×179
=358 ft
hence tara needs 358 ft fencing
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