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Bumek [7]
3 years ago
7

The temperature went from -12°F to 18°F. Which of the following expressions could be used to find how much the temperature chang

ed? 1. -12-18 2. 18+(-12) 3. -12-18 4. 18-(-12) ​
Mathematics
1 answer:
jeyben [28]3 years ago
3 0

Answer:

4. 18-(-12)

Step-by-step explanation:

so i basically took 12 and added that to 18 [and got 30] to find out how many degrees it went up and then i  solved each equation till i got 30. I hope this helped and that you could understand the way i did it.

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3 years ago
An architect designs a rectangular flower garden such that the width is exactly​ two-thirds of the length. If 210 feet of antiqu
ra1l [238]

P=Perimeter

W=Width

L=Length  

Assuming the 210 feet is the perimeter

P = 210 feet

P = 2W + 2L  

W = 2/3 L . . . so sub W with 2/3 L in the equation  

P = 2(2/3 L)+ 2(L) = 210 feet

4/3 L + 2L = 210 feet

10/3 L = 210 feet

Multiply both sides by 3/10 to solve for L

L = (210)(3/10) = 63 feet

W = 2/3 L so W = 2/3 x 63 = 42 feet  

Garden is 42 feet wide by 63 feet long

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3 years ago
I’ll mark u BRILLIANT!the farmers’ market, heirloom tomatoes are sold by the pound. This graph shows the relationship between p,
sineoko [7]

Answer: A

Step-by-step explanation:

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3 years ago
Lizzy bought 5 yards of fabric to make
inn [45]

Answer:

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6 0
3 years ago
A $20,000 business computer depreciates at a rate of 15% per year. What equation would model the value of the computer?
tekilochka [14]

Answer:

A = 20,000(0.85)^t

Step-by-step explanation:

We will use the formula for compound interest here

where A = p( 1 + r)^t

   A=future value  for any sum

   P=present value of the sum

   r= yearly interest rate, it should be expressed in  decimal

   t=time period , it should be in years

______________________________

given in the problem

p = $20,000

r = 15% (in decimal 15/100 = 0.15)

t is the time for which equation is to be model to find future value p

since, rate is for depreciation we need to take negative value of rate as value for computer will decrease

thus

r = -0.15

using the above values in formula  A = p( 1 + r)^t

A = p( 1 + r)^t\\A = 20,000(1 - 0.15)^t\\A = 20,000(0.85)^t

Thus, model  equation for the value of the computer is A = 20,000(0.85)^t

5 0
3 years ago
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