20 + (0.4 × 15) + 12 + (0.4 × 10) = 20 + 6 + 12 + 4 = 42
20 + 15 + 12 + 10 = 57
57 - 42 = 15
15 ÷ 57 × 100 = 1500 ÷ 57 = 26.3
Ans = $42.00, 26% off ...
Answer:
Step-by-step explanation:
1. A
2. B
3. C
4. D
5. B
For this case we must find the quotient of the following expression:
We can rewrite the expression as:
(We take into account that
)
By definition of multiplication of powers of the same base, we place the same base and add the exponents:
By definition of division of powers of the same base, we place the same base and subtract the exponents:
Answer:
Answer:
(5,4)
Step-by-step explanation:
-x+2y=3
3x-2y=7
Add the like terms( 2y and -2y)(-x and 3x)(3 and 7) together. Do this vertically. 2y and -2y cancel eachother out.
Divide both sides by 2
To find y, substitute x in for y in one of the equations
add 5 to both sides
Divide both sides by 2
Check:
When you are multiplying and have like bases, then you add the exponents.
2+3=5
3^5
