Answer is D or the last choice
Let w be the width of the deck. Then, using the total area, we get:
(9+2w)(18+2w)=400
4w²+54w-238=0
2w²+27w-119=0
(2w-7)(w+17)=0
w=-17 or 7/2
Using the positive value, we get a width of 3&1/2 ft. for the deck
☺☺☺☺
1) 0.20%
2)$49.98×50% = $24.99
$49.98×30% = $14.99
$49.98-$14.99 = $34.99
$34.99×20% = $7.00
$34.99-$7.00 = $27.99
Answer:
219 Seconds ; He was 1 second faster
Step-by-step explanation:
Two halfs equal one whole, meaning both of the times added will equal the full time he took:
95+124=219
219 Seconds
He was 1 second faster because:
219-218=1
When you estimate you either round up or down to get an even number. It's easier to mentally multiply numbers ending in 0.
