5/4 + 7/9 = 5*9/36 + 7*4/36 = 45/36 + 28/36 = 73/36 = 2 1/36 so the answer is C
What is 6:12 in simplest form? A. 2:1 B. 1:2 C. 2 D. 12:6
Answers
Both can be divided by 6.
6/6 = 1
12/6 = 2
So 6:12 = 1:2
What is the sum of the first five terms of a geometric series with a1 = 10 and r = 1/5? Express your answer as an improper fraction in lowest terms without using spaces.
Answers
Using the formula for the sum, Sn = a₀×(rⁿ -1)/(r -1) you have S₅ = 10×((1/5)⁵ -1)/(1/5 -1) = 10×(-3124/3125)/(-4/5) = 10×781/625
S₅ = 1562/125
_____ Or, you can add up the terms 10 + 2 + 2/5 + 2/25 + 2/125 = (1250 +250 +50 +10 +2)/125 = 1562/125
Jamaal buys his clothes at Super Discounts. On Saturday, he bought shoes regularly priced at $40 for 25% off, and a jacket regularly priced at $100 for 30% off. Including a 6% sales tax, what total amount will Jamaal pay?
Answers
100-25=75%
$40-100% $ x -75%
100x=3000 x=$30
100-30=70%
$100-100% $ y - 70%
100y=7000 y=$70
total: x+y=70+30=$100
+ sales tax 100% +6%=106%
$100-100% $ z - 106%
10600=100z z=$106
Answer: Jammal will pay $106.
He would pay $30 for the shoes, and $70 for the jacket.
So, in total 106.
If 2/5 divided by blank = 4/5 what is blank
Answers
2/5 ÷ x = 4/5 multiply both sides by x to get it out of the denominator. 2/5 = 4/5x now divide each side by 4/5 to get x by itself. 2/5 ÷ 4/5 = x divide fractions by multiplying the reciprocal of the divisor. 2/5x × 5/4 = x 10/20 = x 1/2 = x
So 2/5 divided by 1/2 =4/5
Urgent help! This is very important please help me fast! How do you do: Expand & simplify:(x 4)(x 2)Can you tell me how to work it out please?
Answers
so the question is asking: (x-4)(x-2) because there is a bracket in between the two expressions it means we have to multiply them together: (x-4) x (x-2)
you can break down the question into smaller parts: x multiply x x multiply -2 -4 multiply x -4 multiply -2
here are the answers: x^2 (means x squared) -2x -4x 8 (because when you multiply two negative numbers it makes a positive)
now you put it into an expression (this is expanding): x^2 - 2x - 4x + 8
to simplify it you collect like terms: x^2 - 6x + 8