MATHEMATICS HIGH SCHOOL

18-6and -18+6 is the same thing

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

18-6=12

-18+6=-12

It is the opposite because rather than subtracting from a positive, you're adding to a negative.

Hope this helps :)

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A family is having a pool built in their backyard. If their yard is rectangular and measures 7x by 6x and the pool is circular with a radius of 2x how much of the yard will be left over after the pool is built?a. 38x2
b. 42x2 – 4x2
c. 42x2 – 2x2
d. 38x2

Answers

Area of a rectangular yard:
A 1 = L x W = 7 x * 6 x = 42 x²
Area of a pool:
A 2 = r² π = ( 2 x )² π = 4 x² π
A = A 1 - A 2
A = 42 x² - 4 x² π
Answer: B ) 42 x² - 4 x² π

Brian invests £600 into his bank account. He receives 3.2% per year compound interest. How much will Brian have after 6 years? Give your answer to the nearest penny where appropriate.

Answers

Answer:

Step-by-step explanation:

We would apply the formula for determining compound interest which is expressed as

A = P(1 + r/n)^nt

Where

A = total amount in the account at the end of t years

r represents the interest rate.

n represents the periodic interval at which it was compounded.

P represents the principal or initial amount deposited

From the information given,

P = £600

r = 3.2% = 3.2/100 = 0.32

n = 1 because it was compounded once in a year.

t = 6 years

Therefore,.

A = 600(1 + 0.032/1)^1 × 6

A = 600(1.032)^6

A = £724.82

Find the value of u - 7 given that 13u -9 = 4

Answers

Answer:

u-7 = ?

13u-9=4

13u=13

u=1

1-7=-6

answer is -6

Step-by-step explanation:

Final answer:

To find the value of u - 7, we first solve the equation 13u - 9 = 4 for u. After finding the value of u, we substitute it into the expression u - 7 to get the final answer.

Explanation:

To find the value of u - 7, we first need to solve the equation 13u - 9 = 4 for u. First, we can add 9 to both sides of the equation to isolate 13u. This gives us 13u = 13. Then, we can divide both sides of the equation by 13 to find the value of u. Therefore, u = 1. Finally, we can substitute this value of u into the expression u - 7 to find the final answer. We have 1 - 7 = -6. Therefore, the value of u - 7 is -6.