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Sonbull [250]
3 years ago
7

The temperature in Toronto at noon during a winter day measured 4 degrees Celsius.The temperature started dropping 2 degrees eve

ry hour.Which inequality can be used to find the number of hours,x,agter which the temperature will measure below-3 degrees celsius
Mathematics
1 answer:
Ronch [10]3 years ago
5 0

Answer:

4−2x<−3

Step-by-step explanation:

check:

now --- 4°

after 1 hr --- 2°

after 2 hrs--- 0°

after 3 hrs--- -2°

after 4 hrs--- -4°

so between 3 and 4 hrs it will reach -3°

4-2x < -3

-2x < -7

x > 3 1/2

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Answer:

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Step-by-step explanation:

Just plug each value in the <em>x </em>column into the dependent variable equation and see if the dependent variable value is true.

7 0
2 years ago
Help me pls it’s using graphs to analyze date i’m usually fine with this i’m just stuck lol
koban [17]

have a good night :)

Step-by-step explanation:

17-19=2       20-22=3       23-25=5      26-28=6

4 0
3 years ago
Two cans of paint and 1 brush cost $37. Four cans of paint and 3 brushes cost $81. Find the cost of one can of paint.
weeeeeb [17]
2c + b = 37 ....multiply by -3
4c + 3b = 81
------------------
-6c - 3b = - 111 (result of multiplying by -3)
4c + 3b = 81
------------------add
-2c = - 30
c = -30/-2
c = 15 <== $ 15 for a can of paint

and it costs $ 7 for each brush
8 0
3 years ago
Jeffrey is using a copy machine to make posters for a school play. The machine prints the posters at a constant rate. After 3 mi
jasenka [17]

Answer:

B: 11 minutes.

Step-by-step explanation:

So, we know that the machine prints at a constant rate.

After 3 minutes, the machine prints 108 posters.

So, let’s find the <em>unit rate. </em>We will divide the output over the input. So:

108\text{ posters}/3\text{ minutes}=36\text{ posters/min}

So, the unit rate of the machine is 36 posters per minute.

We can write an equation. If t represent the number of minutes and p represent the amount of posters, then:

p=36t

Gives the amount of posters p and t minutes.

We want to know how long it will take Jeffrey to make 396 posters.

So, we can substitute 396 for p and solve for t. Hence:

396=36t

Divide both sides by 36:

t=11

Therefore, it will take Jeffrey 11 minutes to make 396 posters.

7 0
3 years ago
Ashish deposite rs 1000 every month is a recurring deposit account for period of 12 months. If the bank pays interest at a certa
rusak2 [61]

Solution :

Given :

Principal amount, P = Rs. 1000

Time period = 12 months

The maturity value = Rs. 12,715

We know that,

$ SI = \frac{PTR}{100}$

$SI = 1000 \times \frac{n(n+1)}{2 \times 12} \times \frac{R}{100}$

$SI = 1000 \times \frac{12(12+1)}{2 \times 12} \times \frac{R}{100}$

SI = 65 R

So we know,

maturity value = principal amount + SI

12715 = 1000 + 65 R

65 R = 12715 - 1000

65 R = 11715

R = 18%        

So the rate is 18%

                           

3 0
2 years ago
Read 2 more answers
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