Answer: y = 7
Step-by-step explanation:
Step 1) plug in 3 for y and 9 for x in the direct variation formula, which is y = kx
3 = k(9)
Step 2) Solve for k
3 = k(9) (Divide by 9 on both sides)
3/9 = k (Now simplify 3/9)
1/3 = k. So k = 1/3
*just FYI: “k” is the constant of variation.
Step 3) use the equation y = kx and plug in 1/3 for k
y = 1/3x
Step 4) using the equation y = 1/3x, plug in 21 for x.
y = 1/3(21) (1/3*21 is the same as 21/3)
y = 21/3 (21/3 = 7)
y = 7. So that’s you’re answer! When x=21, y=7 because 7 is 1/3 of 21!
Hope this helps! My best wishes to you as you go through school!
Answer:
- 16
Step-by-step explanation:
following the rules as set out in PEMDAS
4² - 2(3 × 5 + 1) ← evaluate exponent term
= 16 - 2(3 × 5 + 1) ← evaluate multiplication inside parenthesis
= 16 - 2(15 + 1)
= 16 - 2(16) ← perform the multiplication
= 16 - 32 ← evaluate subtraction
= - 16
The total surface area of this prism would be 120 square feet.
The answer is 56,700
If you take 7500 and divide it by 100 than multiply by 7 you get 525 and multiply 525 by 12 you get 6,300 than 6,300 multiplied by those 9 years you get 56,700