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Simora [160]
3 years ago
10

5. Solve this system of equations. 3x + 4y = 36 y = -x +8. please help meee3333............​

Mathematics
1 answer:
Yanka [14]3 years ago
7 0

Answer:

x = -4 and y = 12

Step-by-step explanation:

Since you have y = -x + 8 you can substitute this into the first equation where y was so you have 3x + 4(-x + 8) = 36.

That way, there is only one variable and it is easier to solve.

3x + 4(-x + 8) = 36

3x -4x + 32 = 36

-x +32 = 36

-x = 4

x = -4

Plugging this into the equation y = -x +8,

y = -(-4) + 8

y = 4 + 8

y = 12

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What is the area of the regular trapezoid below?<br> - 6 cm<br> T<br> 8 cm<br> 10 cm
Elenna [48]

Answer:

Area = 64 cm²

Step-by-step explanation:

To find the area, we have to follow some steps:

=> <u>Step 1: Make the bases similar:</u>

Since we have 2 bases given 6 and 10 we have to come up with a third base by finding their average:

(6 + 10) / 2

(16) / 2

8

So now that we know our base,

=><u> Our second step is to multiply the base we found by the height of the trapezoid:</u>

Area = common base * height

Area = 8 * 8

Area = 64 cm²

Hope this helps!

5 0
2 years ago
If the sum of two numbers is 15 and their product is 50 what are they
Westkost [7]
Xy = 50
x + y = 15

x = 15 - y

xy = 50

(5 - y)y = 50

5y - y^2 = 50

y^2 - 5y + 50 = 0

(y - 5)(y - 10) = 0

y - 5 = 0 or y - 10 = 0

y = 5 or y = 10

x + y = 15

For y = 5: 

x + 5 = 15

x = 10

For y = 10

x + 10 = 15

x = 5

Answer: the numbers are 5 and 10.

5 0
2 years ago
I need help with thisss
Yanka [14]
I believe the answer is 18, because 5x3=15, so we can only assume that N is 6x3=18.
5 0
3 years ago
Read 2 more answers
Plz help me with this problem
zvonat [6]

Answer:

what is the problem

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
A robot is expected to filter pollution out of at least 350 liters of air and water. It filters air at the rate of 50 liters per
s2008m [1.1K]

Answer:

20W+50A\geq 350

Step-by-step explanation:

we are given that A robot is expected to filter pollution out of at least 350 liters of air and water.

Also It filters air at the rate of 50 liters per minute, and it filters water at the rate of 20 liters per minute.

The inequality for  number of minutes the robot should filter air (A) and water (W) to meet this expectations can be writte as follows:

20W+50A\geq 350

Hence the required inequality has been formulated.

4 0
2 years ago
Read 2 more answers
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