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REY [17]
3 years ago
11

A electrician charges $45 per hour and spends $20 a day on gasoline.Write an algebraic expression to represent his earnings for

one day.
Mathematics
2 answers:
nasty-shy [4]3 years ago
4 0
Y= earnings of the electrician
x=hrs working
y=45x-20
Since he charges 45 dollars an hour you subtract 20, which is the amount he spends, and get the earnings of the day
Sliva [168]3 years ago
3 0
(45 X 24) - 20

hope this helps!
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Answer:

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Step-by-step explanation:

200 divided by 2 1/2 is 80.

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3 years ago
The product of 2 numbers is -24 and their sum is -5. What are the two numbers and why are they the two numbers?
lana [24]

The numbers are (-8, 3) or (3, -8).

Step-by-step explanation:

  • Step 1: Given the product of the numbers are -24 and their sum are -5. Let the numbers be a and b. Form equations out of these details.

⇒ a + b = -5 ⇒ b = -5 - a

⇒ a × b = -24 -------- (1)

  • Step 2: Substitute the value of b in eq(1)

⇒ a × (-5 - a) = - 24

⇒ -5a - a² = -24

⇒ a² + 5a - 24 = 0

  • Step 3: Solve the quadratic equation for a.

a = (-5 ± √25 - 4 × 1 × -24)/2

  = (-5 ± √121)/2

  = - 16/2, 6/2 = -8 or 3

  • Step 4: For each value of a, find b.

When a = -8, b = -5 +8 = 3

When a = 3, b = -5 - 3 = -8.

6 0
2 years ago
A number increased by 24 is 112. what is the number
dexar [7]
I believe the correct number is 88.
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Which is the slope of the line that passes through the points (3,17) and (7,25)? a slope = 1/2 b slope = 2 c slope = −2 d slope
Ierofanga [76]
Slope is y2-y1/x2-x1
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The answer should be b
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50% of what number is 140?
babunello [35]

Answer:

The answer is 70

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