make a proportion
<span>Let x = the amount of feet descended in 3 minutes (thus the total change of altitude of the balloon)
</span><span> 320 (feet per minute) / 1 (minute) = x (feet per minute) / 3 (minutes)
</span><span> 1) Divide: 320/1 = 320.
</span><span> 2) Multiply: 320 x 3= 960.
</span><span> The balloon that descends at a rate of 320 feet/minute (so, every minute, it descends 320 feet) descends a total of 960 feet in 3 minutes.
</span><span> The balloon's total change in altitude is -960 feet. </span>
What are factors of -40?
(-20)(2)
(-10)(4) (sum of these factors is 6, which is not what we wanted)
(-5)(8) = -40 and the sum of the factors (-5) and (8) is 3.
{-5, 8} is the list of factors of -40 that add up to 3.
22 5/8 ÷ 2 2/3 = 8.484375
So it can make 8.484375 pieces of ribbon
D
You figure out the absolute value by determining how far the number is from the point 0 on a number line.
Answer:
11,495 and 6,030
Step-by-step explanation:
1. A=1/2(a+b)h
2A=(a+b)h
2Ah=a+b
2Ah-b=a
a=2×360×16-25
a=11,495
2. b=2Ah-a
b=2×252×12-18
b=6,030
