MATHEMATICS HIGH SCHOOL

The sum of three is 45. The second of the Three numbers is three more than twice the first number X. The third number is two more than the first number X. Which equation can be used to solve for the first number X

Answers

Answer 1

Answer:

Answer:

see explanation

Step-by-step explanation:

the first number is x

the second number is 2x + 3

the third number is x + 2

sum the 3 numbers and equate to 45

the equation to solve for x is then

x + 2x + 3 + x + 2 = 45 ( simplify left side )

4x + 5 = 45 ( subtract 5 from both sides )

4x = 40 ( divide both sides by 4 )

x = 10

the first number is 10

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= (b) Use your calculator to determine the exact value of 35.23 x 3.02 Exactly Correct to 2 decimal place

Ben wants to put a dog fence around an areain his yard. If the length is 5 feet longer than its
width and Ben uses 70 feet of fencing, what are
the dimensions of the enclosed area? PLEASE HURRY

Answers

Answer:the dimensions of all sides are 15 and 15 then add 5 because it said to and you would get 20 and 20 witch all together is 70 feet of fencing

Step-by-step explanation:

Jessica has -$15 dollars in her bank account. Jonathan has less money than Jessica in his bank account. Which value could represent the amount of money in Jonathan’s bank account?

Answers

Answer:

x∠15 or 15 is greater than x The x being the amount of money Jonathan has in his bank account.

Step-by-step explanation:

Sorry if this is not what you are looking for.

–81, 108, –144, 192, ...Which formula can be used to describe the sequence?
A.f(x) = –81(4/3)^x-1
B. f(x) = –81(-3/4)^x-1
C. f(x) = –81(-4/3)^x-1
D. f(x) = –81(3/4)^x-1

Answers

r = 108/-81 = -144/108 =192/-144 = -4/3
This is a geometric sequence with a common ratio (r) = -4/3
The nth term of a geometric sequence is given by tn = ar^(n-1) where a is the 1st term.
Therefore, the formular for the sequence is f(x) = -81(-4/3)^(x-1)
Answer: C [f(x) = -81(-4/3)^(x-1)]

Answer: C. f(x) = -81(-4/3)^(x-1)

This is just the short answer for all of you that are working on edge.nuity and don't have the time or need for a long explanation. I just took the unit test and this was correct, I hope this helped someone out there :3

What are the explicit equation and domain for a geometric sequence with a first term of 2 and a second term of −8? an = 2(−8)n − 1; all integers where n ≥ 1 an = 2(−8)n − 1; all integers where n ≥ 0 an = 2(−4)n − 1; all integers where n ≥ 0 an = 2(−4)n − 1; all integers where n ≥ 1

Answers

Hello,

The question is
"What are the explicit equation and domain for a geometric sequence with a first term of 2 and a second term of −8?"

It is a geometric sequence =>U(2)=U(1)*r==>-8=2*r ==>r=-4

U(1)=2=2*(-4)^0
U(2)=-8=2*(-4)=2*(-4)^1
U(3)=32=-8*(-4)=2*(-4)(-4)=2*(-4)^2
U(4)=-128=32*(-4)=2*(-4)^3
...
U(n)=2*(-4)^(n-1) where n>=1.

Answer C

How many solutions are there to the equation 12x 6=5x

Answers

I'm pretty sure the answer would be 1, since it does look linear

Here are two similar solid toys.A
B
The ratio surface area of toy A : surface area of toy B is 7:9
The volume of toy B is 20 cm
I
Work out the volume of toy A.
Give your answer correct to 3 significant figures.

Answers

The volume of toy A will be equal to 13.7 cubic centimetres.

What are ratios and proportions?

An ordered pair of numbers a and b, represented as a / b, is a ratio if b is not equal to 0. A proportion is an equation that sets two ratios at the same value.

The numerical relationship between two values demonstrates how frequently one value contains or is contained within another.

Given that the ratio surface area of toy A: to the surface area of toy B is 7:9. The volume of toy B is 20 cm

The computation of the volume of toy A is shown below:

7 × k²=9

k²= 9 ÷ 7

k=√(9 ÷ 7)

k = 1.133893419

Now

The volume of toy A = 20 ÷ 1.133893419³

The volume of toy A = 13.7 cubic centimetres

Therefore, the volume of toy A will be equal to 13.7 cubic centimetres.

The missing figure is attached with the answer below.