8xy-7xy-3xy-3y²-2y²+8y²+5x²+12x²
then simplify by combining like terms -2xy+3y²+17x²
<h3>Answer:</h3>
a) l = 5 + 2w
b) P = 2(l +w) = 2(5 +2w +w)
c) w = 8 cm, l = 21 cm
<h3>Explanation:</h3>
a) Using w for width, twice the width is 2w, and 5 more than that is 5+2w. This is your expression for l:
... l = 5 + 2w
b) The perimeter is the sum of the lengths of all sides, so is the sum of twice the length and twice the width.
... P = 2(l +w) = 2(5 +2w + w) . . . . substituting for l using the expression of (a)
c) Substituting the given perimeter, we have ...
... 58 = 2(5 +3w) = 10 + 6w . . . . . collect terms, eliminate parentheses
... 48 = 6w . . . . . . . . . . . . . . . . . . subtract 10
... 8 = w . . . . . . . . divide by 6
... l = 5 + 2·8 = 21 . . . . . find length using the formula for it
Dimensions are in centimeters, so we can write the solution as ...
- width = 8 cm
- length = 21 cm
Answer:
Step-by-step explanation: you multiply the base times the height (6 x 4) which equals 24ft
I’m pretty sure the answer is a
Answer:
Step-by-step explanation:
<u>Correct way of dividing fractions:</u>
- 14/15 ÷ 7/5 = 14/15 × 5/7
<u>Answer choices</u>
- A) Multiplying 14/15 by 5 and then by 17. FALSE
- B) Multiplying 14/15 by 5 and then dividing by 7, TRUE
- C) Dividing 14/15 by 5, and then multiplying by 17. FALSE
- D) Multiplying 15/14 by 7 and then dividing by 5. FALSE
- E) Multiplying 14/15 by 7 and then multiplying by 15. FALSE
