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sashaice [31]
3 years ago
13

What is the y intercept for 2x-5y=15

Mathematics
2 answers:
Anni [7]3 years ago
8 0
Set as equation of x
2x-5y=15
2x=15+5y
x=(15+5y)/2

set to 0
solve for y
0=(15+5y)/2
0=15+5y
-15=5y
-3 = y
omeli [17]3 years ago
3 0
It would be -3. Your equation would be. -5y=-2x+15. Then you divide everything buy -5 and come out with y=-2/-5-3.
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Estimate the size of a crowd at a political rally that occupies a rectangular space with dimensions of 500 feet by 600 feet (to
Andrej [43]

Answer: 66,667 people

Step-by-step explanation:

The first thing is to find the area of the rectangle , since it is a rectangular field.

A = L X B

A = 500 X 600

A = 300,000

It was said that each person occupies 4.5 square feet , then to find the crowd we have:

Number of crowd = Area of the field / feet occupied by each person

= 300,000/4.5

= 66,666.66667

= 66, 667 to the nearest whole number

4 0
3 years ago
Can you explain how would you solve 16-(-6)​
Elena-2011 [213]

Answer:

22

Step-by-step explanation:

Because it is a double negative, the negatives cancel each other out and turn into a positive so what you are really solving is 16+6 which is 22

4 0
3 years ago
Read 2 more answers
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Natali5045456 [20]

Answer:

C: 8.96

Step-by-step explanation:

We know taht ZX is similar to PQ. We can now set up the ratio of 6.4: 5.12

This ratio gives us .8:1

Multiply VX by the ratio to find its corresponding similar side of RQ

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6 0
2 years ago
Prove the quadratic formula
STALIN [3.7K]

ax² + bx + c = 0

x = (-b ± √(b² - 4ac))/2a


First, rewrite the first equation so that the first coefficient is 1. Divide everything by a.

(ax² + bx + c = 0)/a =

x² + (b/a)x + (c/a) = 0

Isolate (c/a) by subtracting (c/a) from both sides

x² + (b/a)x + (c/a) (-(c/a) = 0 (- (c/a)

x² + (b/a)x = 0 - (c/a)

Add spaces

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Take 1/2 of the middle term's coefficient and square it. Remember that what you add to one side, you add to the other.

x² + (b/a)x + (b/2a)² = -c/a + (b/2a)²

Simplify the left side of the equation.

x² + (b/a)x + (b/2a)² = (x + (b/2a))²

(x + b/2a))² = ((b²/4a²) - (4ac/4a²)) -> ((b² - 4ac)/(4a²))

Take the square root of both sides of the equation

√(x + b/2a))² = √((b²/4a²) - (4ac/4a²))

x + b/(2a) = (±√(b² - 4ac)/2a

Simplify. Isolate the x.

x = -(b/2a) ± (∛b² - 4ac)/2a = (-b ± √(b² - 4ac))/2a

~

3 0
3 years ago
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Mandarinka [93]

Step-by-step explanation:

1. SAS

2. SSS

3. RHS

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5. RHS

6. SAS

7. ASA

8. SAS

9. ASA

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5 0
3 years ago
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