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bekas [8.4K]
3 years ago
14

a painter can paint 20 windows in one day. If he has to paint 50 pairs of windows how much time will he take to paint

Mathematics
1 answer:
vazorg [7]3 years ago
5 0

Answer:

50*2=100

100/20=5

The answer is 5 days!

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Solve the following systems by the addition method <br><br> 4x - y =3<br> 2x+3y = 18
Taya2010 [7]
Hello :
<span>4x - y =3........ ×3
2x+3y = 18
 I'have :  12x-3y = 9
               2x +3y = 18
</span><span>by the addition method : 14 x =27
</span> x = 27/14
4(27/14)-y = 3
y = 33/7


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3 years ago
Here are the grades ! Help me please
pychu [463]
I think the answer is 2.07, I’m not positive so I’m really sorry if I’m wrong
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3 years ago
The temperature T of an object in degrees Fahrenheit after t minutes is represented by the equation T(t) = 69e−0.0174t + 79. To
Papessa [141]

Answer: T(90) = 93.413 F

Step-by-step explanation:

The temperature T of an object in degrees Fahrenheit after t minutes is represented by the equation

T(t) = 69e−0.0174t + 79.

T is the dependent variable while t is the independent variable. To determine any value for Temperature, we will input the corresponding value for time into the function.

We want to determine the temperature of the object after one and a half hours. This means that we have to convert one and a half hours to minutes

1f 1 hour = 60 minutes

Then 1.5 hours = 1.5 × 60 = 90 minutes.

We would substitute t = 90 minutes into the equation, it becomes

T(90) = 69e−0.0174×90 + 79

T(90) = 69e−1.566 + 79

T(90) = 14.413 + 79

T(90) = 93.413 F

5 0
2 years ago
What does it mean if your final exam grade is modeled by the function f(x) = 100 - 3.3x?
rjkz [21]

Answer:

i need points

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
The ratio of boys to girls in a class is 2:3. If there are 18 girls in the class, what is the probability of a boy being in the
lukranit [14]

Answer:

0.4

Step-by-step explanation:

If the ratio of boys to girls in a class is 2:3, then

  • there are 2x boys;
  • there are 3x girls.

If there are 18 girls in the class, then

3x=18\\ \\x=6

Thus, there are

  • 2\cdot 6=12 boys;
  • 3\cdot 6=18 girls;
  • 12+18=30 students in total.

The probability of a boy being in the class is

P=\dfrac{12}{30}=\dfrac{2}{5}=0.4

7 0
3 years ago
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