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harina [27]
3 years ago
6

3x+2y=0 x-5y=17 solve in a Solving Systems by Elimination

Mathematics
2 answers:
s2008m [1.1K]3 years ago
6 0

Answer:

For the first one,"3x+2y=0". i got 5=0.

For the second one,"x-5y=17". I got 3x

Step-by-step explanation:

Illusion [34]3 years ago
3 0

Answer:

The answer is below!

Step-by-step explanation:

I hope this helps!

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Twelve times the sum of three and a number is equal to five times the sum of eight more then twice the number
Andreas93 [3]
The equation is 12(3+x)=5(2x+8)
4 0
3 years ago
I really need help do can someone do it step by step so I can understand plzzzz​
Alekssandra [29.7K]

Answer:

64 × pi m²

Step-by-step explanation:

the formulas needed for the surface area of a cone are :

base area plus the "mantle", the lateral "wall" around it.

the base area is a circle.

so, that formula is Ac = pi×r²

the "wall" formula is Aw = pi×r×s

r = radius

s = slant height = 12

the formula for the surface area of a sphere is

As = 4×pi×r²

we know now, that both surface areas are the same, and also the radius is the same for both objects.

Ac + Aw = As

pi×r² + 12×pi×r = 4×pi×r²

=>

12×pi×r = 3×pi×r²

12×pi = 3×pi×r

12 = 3×r

r = 4 m

now, we only need to use this value of r in our formulas for surface areas, like for the sphere :

4×pi×r² = 4×pi×4² = 4³×pi = 64×pi

3 0
2 years ago
A student is finding the measures of the angles in a triangle that have the ratio 4:4:7. Find the mistake and correct it.
7nadin3 [17]

suppose 4:4:7 be 4x, 4x, 7x

or, 15x = 180°

or, X = 180/15

or, X = 12

therefore,

4x = 4x12= 48

4x= 4x12= 48

7x= 7x12= 84

so if you plus all of them you get 180

8 0
2 years ago
If f(x) = 2x and g(x) = 5x + 2, what is (f + g)(x) when x = 3?
Minchanka [31]

Answer:

f÷g=2x+5x+2=7x+2

x=3

7×3+2=21+2=23

8 0
2 years ago
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A rectangular napkin has an area of 88 square centimeters and a length of 8 centimeters.
Svetllana [295]
11 centimeters
This is because a rectangle has an area of length times width and so you can divide 88 by 8 to get 11
3 0
3 years ago
Read 2 more answers
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