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pentagon [3]
2 years ago
6

Pls help meI m giving brainliest ​

Mathematics
1 answer:
navik [9.2K]2 years ago
3 0

Step-by-step explanation:

the general line equation format is

y = ax + b

a is the slope or gradient of the line. it is the ratio of "y coordinate change / x coordinate change".

b is the y-intercept, the y value when x = 0. we get this by putting one point into the equation and solve for b.

(i)

A (3, 5)

B (5, 9)

x changes by +2 (from 3 to 5).

y changes by +4 (from 5 to 9).

so, the slope (or gradient) is +4/+2 = 2

(ii)

the semi-finished equation is

y = 2x + b

let's use A to get b :

5 = 2×3 + b = 6 + b

b = -1

and the full equation is

y = 2x - 1

(iii)

for point (4, k) we get

k = 2×4 - 1 = 8 - 1 = 7

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Answer:

y = 100 - 2.5 x is the equation that represents her total profit from

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Step-by-step explanation:

The given is:

1. An electrician earns 100 dollars for a project installing light fixtures

2. She must pay for the light fixtures herself and they cost 2 dollars

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3. x represent the number of light fixtures and y represent her

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Her profit is the amount of money she has left over after paying for

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∵ The cost of each light fixtures is 2 dollars and 50 cents

- Let us change the cents to dollar

∵ $1 = 100 cents

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∵ Her profit = The money she earns - The money she pays

∴ The cost of each light fixtures = $2.5

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∵ Her profit is $y

∴ y = 100 - 2.5 x

y = 100 - 2.5 x is the equation that represents her total profit from

the project

Step-by-step explanation:

4 0
3 years ago
PLEASE HELP I WILL GIVE BRAINLIEST TO THE FIRST PERSON TO ANSWER
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Answer:

1. 2x = 60

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