Answer:
21 and 30
Step-by-step explanation:
x + y = 51
x - y = 9
add the two equations and y's will cancel out
2x = 42 divide by 2
x = 21 so put 21 in for x in the top equation and solve
21 + y = 51
y = 30
Let f be the fraction invested at 10%. So (1-f) is the fraction at 7%. After one year the interest is
664 = 8200 f (.10) + 8200 (1-f) (.07) = 8200(.03)f + 8200(.07)
f = (664 - 8200(.07))/(8200(.03)) = .3659 = 36.59 %
Answer: 36.59%
Check:
8200(.3659)*.1 + 8200(1-.3659)*.07 = 664.01 good
<h3>
Answer:</h3>
414.48 square feet is needed to make 3 dozen of the covers.
<h3>
Step-by-step explanation:</h3><h3>Step 1: Find the circumference, perimeter, of the circle.</h3>
To find the circumference, you multiply the 4 by π, and π is 3.14, and you get 12.56.
<h3>Step 2: Find the area of the side, not including the circle.</h3>
The 12.56 is literally the length of the side. The width is the height of the cover which is 10 inches. 12.56 multiplied by 10 is 125.6 square inches.
Step 3: Add them up.
125.6 + 12.56 is 138.16
<h3>Step 4: Multiply 138.16 by three dozen (36 [a dozen is 12]).</h3>
138.16 multiplied by 36 is 4973.76 square inches.
<h3>Step 5: Convert 4973.76 square <u>inches</u> to square <u>feet</u>.</h3>
12 inches is 1 foot so we divide 4973.76 by 12. You get 414.48 square feet.
Odd function must pass through origin so first two options are not correct.
Odd function must be rotational symmetry around origin. So last option is not correct.
So answer is C.
