MATHEMATICS HIGH SCHOOL

Jamal borrowed $625 from his brother 8 years ago. Jamal repaid his brother in full with $830. What simple annual interest rate did Jamal pay?A. 4.0%
B. 4.1%
C. 4.2%
D. 4.3%

Answers

Answer 1

Answer:

Answer: b 4.1%

Step-by-step explanation:

Answer 2

Answer: B. 4.1%. ...................

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What is the value of 12.5 10^7?a. 12.5000000
b. 1,250,000
c. 125,000,000
d. 1.2500000

Answers

12.5 x 10^7 = 125,000,000
So the answer is C.)

love, the Pineapple.

Which expressions are differences of squares?Choose all answers that are correct.
(Please explain)
2a^4 – 49b^6

25d^12 – 36f^8

81p^6 – 16q^2

100s^9 – 9t^3

Answers

All of them except for the first one are differences of squares. Differences of squares is a form of factoring perfect squares. A 'perfect square' is just a fancy term that basically means you are doubling a number. Like the number 25 you multiply 5x5 to get that number and if you were to take the square root of that number you would also get 5. For it to be differences of two squares you have to have two numbers that if square rooted (in a calculater if you need one) would turn out to be a whole number or 'perfect'.

Answer:

All are correct but 100s^9-9t^3 this one is incorrect I just took the quiz

Write standard form of the equation of the line described.Through (2,0) parallel to y =2/3x

Answers

$y=(2)/(3)x , \ \ (2,0)\n \n m=(2)/(3) \n \n The \ slope \ of \ lines \ parallel \ is \ the \ same \n \n use \ y = mx + b \ and \ the \ point \ (2,0) \ to \ find \ b \n \n 0= -(2)/(3)\cdot 2+b$

$0=-(4)/(3) +b \n \nb=-(4)/(3) \n \ny=-(2)/(3)x+(4)/(3)$

A dartboard consists of two concentric circles. The probability of hitting the inner circle is64%. If the outer circle has a diameter of 20 inches, what is the radius of the inner circle?

2 inches
4 inches
8 inches
16 inch

Answers

Given:
Diameter of outer circle = 20 inches.

We need to find the Area of the outer circle to get the radius of the inner circle.

Area = πr²

Outer circle Area = 3.14 * (10in)² = 314 in²

314 in² * 64% probability = 200.96 in² Area of the inner circle.

200.96 in² = 3.14 * r²
200.96 in² / 3.14 = r²
64 in² = r²
√64 in² = √r²
8 in = r

radius of inner circle is 8 inches.

How to multiply 25 by 5 without using calculator?

Answers

Hey There

In multiplication you have to know the process of regrouping, which means to take away from tens. Also, you multiply from left to right.

Steps
1. First multiply 5*5=25, the two adds to the product of 5*2

2. Now you have to multiply 5*2=10, now you have to add two because of regrouping, 10+2=12, so you're final answer is 125.

In conlusion, 25*5=125

Hope this helps :)

2 5

× 5
___________
1 2 5
____________

1st step: 5 × 5 = 25. Put down 5 . Keep 2 aside.

2nd step: 5 × 2 = 10. 10 plus the 2 kept aside = 12

3rd step : write down 12.

That brings the answer to 125.

True or False: (x + 4)(x - 4) = x2 - 8x + 16