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devlian [24]
3 years ago
14

Solve these two equations using the Addition Method (also known as the elimination method).

Mathematics
1 answer:
Brums [2.3K]3 years ago
4 0

Answer:

(-2, 3)

Step-by-step explanation:

5/2(3/4x + 1/3y = -1/2)

1/2x - 5/6y = -7/2

15/8x + 5/6y = -5/4

19/8x = -19/4

x = -2

1/2(-2) - 5/6y = -7/2

-1 -5/6y = -7/2

-5/6y = -5/2

y = 3

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5 0
4 years ago
The area of the curved surface of a cylinder is 6160cm. The height of the cylinder is 10cm. What is the radius of the cylinder i
valina [46]

Answer:

r = 98 cm

Step-by-step explanation:

Formula for curved surface area = 2\pi rh

where r = radius & h = height

Let the radius be 'r'.

According to the question ,

6160 = 2 \times \pi \times r \times 10

=  > 20\pi r = 6160

=  > r =  \frac{6160}{20\pi}  =  \frac{6160 \times 7}{20 \times 22}  = 98cm

3 0
3 years ago
The axis of symmetry for the graph of the function f(x)=3x^2+bx+4 is x= 3/2. what is the value of b
Papessa [141]

Answer:

b = -9

Step-by-step explanation:

The function is given as :

f(x)=3x^2+bx+4

The axis of symmetry for this function is x = 3/2

It is required to find the value of b. The axis of symmetry of a parabola is a vertical line that intercepts its vertex at its horizontal coordinate. It can be given by :

x=\dfrac{-b}{2a}

Putting x = 3/2 and a = 3 we get :

b=-2ax\\\\b=-2\times 3\times \dfrac{3}{2}\\\\b=-9

So, the value of b is -9.

6 0
3 years ago
Which is the constant of variation, k, if y=kx, and y=10 when x=15?
Furkat [3]

Answer:

A. 2/3

Step-by-step explanation:

If your equation is y=kx then you just fill in the variables that you have.

y=kx\\10=15k\\k=2/3

7 0
2 years ago
What is a integer pair that has product of 63 & the sum of 24
BigorU [14]
The two numbers are 3 and 21, because 3 x 21 = 63 and 3 + 21 = 24. 
8 0
3 years ago
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