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Kay [80]
2 years ago
15

Determine the solution of the system. Show your work

Mathematics
1 answer:
Oxana [17]2 years ago
3 0
First question:

1. Set equations equal to each other so 5x-9=2x+6
2. Put x's on one side so that 3x=15
3. Divide by 3 so that x=15
4. Substitute 15 in for x so that y=2(15)+6
5. Solve for y so that y=36
6. Thus the equations intersect at (15,36)

Second question:

1. Since for lines y=mx+b, and m=slope=3 you only need to write an equation with slope 3
2. y=3x+b, b can be any number
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Sarah wants to fence her garden, as shown below. Determine how much fencing to the nearst foot that
coldgirl [10]

Answer:

431.775 ft

Step-by-step explanation:

So basically we should first find the area of the rectangles which is  28 ft * 15 ft, which you get 420. Next for the semicircle, the diameter is 15 but we need the radius so you divide that by 2 to get 7.5 as the radius. Then u multiply 7.5 * π, or 3.14 to get 23.55. But since its a semicircle, or half a circle we divide 23.55 by 2 which is 11.775. Then we just add the results which is 420 ft and 11.755 ft to get a total area of 431.775 ft.

-Hope this helped!

4 0
3 years ago
Ellen drove 277.2 miles. For each gallon of gas, the car can travel 21 miles. How many gallons of gas did Ellen use?
Paul [167]

Answer:

the answer is 13.2

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Please only right answers no links or anything and please answer quick!!!ILL MARK BRAINLEST PLEASE QUICK QUICK QUICK QUICK QUICK
Snowcat [4.5K]

Answer:

Interior angles im pretty sure

d^2+35+109=180

d=6

HOPE THIS HELPS

-Todo <3

Step-by-step explanation:

d^2+35+109=180

144+d^2=180

-144         -144

36=d^2

d=6

6 0
2 years ago
3x+2y=8 is this function a quadratic?
Angelina_Jolie [31]
No, it is a linear function.
8 0
3 years ago
Read 2 more answers
What is an equivalent to -16m^2n-(-25m^2n)+(-7m^2n)
pantera1 [17]

Answer:

The equivalent expression is:

-16m^2n-\left(-25m^2n\right)+\left(-7m^2n\right)=2m^2n

Step-by-step explanation:

Given the expression

-16m^2n-\left(-25m^2n\right)+\left(-7m^2n\right)

\mathrm{Remove\:parentheses}:\quad \left(-a\right)=-a,\:-\left(-a\right)=a

=-16m^2n+25m^2n-7m^2n

\mathrm{Add\:similar\:elements:}\:-16m^2n+25m^2n-7m^2n=2m^2n

=2m^2n

Therefore, the equivalent expression is:

-16m^2n-\left(-25m^2n\right)+\left(-7m^2n\right)=2m^2n

7 0
2 years ago
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