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3 years ago

Mark mows lawns for 2.25 an hour if he spends 7 hours mowing lawns during one weekend how much money will he earn

Mathematics

1 answer:

Helga [31]3 years ago

8 0

Answer:

15.75 i thank

Step-by-step explanation:

bc multiply 2.25 x 7 = 15.75

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Solve the system of equations by substitution

scoundrel [369]

Answer:

(x, y) = (1, 3)

Step-by-step explanation:

given the 2 equations

x + y = 4 → (1)

y = 3x → (2)

Substitute y = 3x into (1)

x + 3x = 4

4x = 4 ( divide both sides by 4 )

x = 1

Substitute x = 1 into (2) for corresponding value of y

y = 3 × 1 = 3

solution is (1, 3 )

7 0

3 years ago

hey guys pls help me i need to submit this before 1hr .graphing an inverse function.y = 4x + 12 using the x values (-2,-1, 0, 1

Andrew [12]

Answer:

4, 8, 12, 16, 24

Step-by-step explanation:

Replace the x with the x values starting at -2 and use the equation with the new x value.

E.g.

x = -2

y = 4 * -2 + 12

y = 4

Sorry if my explanation isn't the best.

3 0

2 years ago

What is the product of 2.52 and 3.4

ElenaW [278]

2.52 x 3.4

= (2.50 + 0.02)(3.00 + 0.40)

= 2.50 x 3.00 + 2.50 x 0.40 + 0.02 x 3.00 + 0.02 x 0.40

= 7.500 + 1.000 + 0.060 + 0.008

= 8.500 + 0.060 + 0.008

= 8.560 + 0.008

= 8.568

5 0

3 years ago

Landon is standing in a hole that is 5.1 ft deep. He throws a rock, and it goes up into the air, out of the hole, and then lands

Black_prince [1.1K]

When the rock hits the ground, y = 0

-.005x^2 +0.41x -5.1 = 0

Multiply equation by (-200)

x^2 -82x +1020 = 0

Use quadratic formula:
$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} = \frac{82 \pm \sqrt{82^2 -4(1)(1020)}}{2} \\ \\ x = \frac{82 \pm 51.4198}{2} \\ \\ x = 15.29 , 66.71$

Since the ball is initially below the ground, on its way up it will reach the point where y=0 but still be in the air, therefore the ball lands the second time y=0 or when x is larger.

Answer: 66.71 feet

6 0

3 years ago

Read 2 more answers

Elimination<br>3x +2y=9<br>3x ty=0<br>1

muminat

Answer:

$y = 9$