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bagirrra123 [75]
3 years ago
12

How do I solve this help plz

Mathematics
2 answers:
Yakvenalex [24]3 years ago
4 0
If you replace z with 3 it will still be -3/4 so 3 is your answer
Bumek [7]3 years ago
4 0
The answer would be 3. This is because since the denominators and sign are the same, the numerator also must be the same, too. Therefore, z can be replaced with 3. Hope this helped!
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Washing his dad's car alone, eight-year-old Levi takes 2.5 hours. If his dad helps him, then it takes 1 hour. How long does it t
Dmitry [639]

Answer:

Levi's dad takes 1.67 hours to wash the car by himself

Step-by-step explanation:

* Lets explain how to solve the problem

- Levi takes 2.5 hours to wash his dad's car alone

- Levi and his dad take 1 hour to wash the dad's car together

∵ Levi takes 2.5 hours to wash the car alone

∴ The rate of Levi is 1/2.5 car/hr

∵ His dad takes x hours to wash the car alone

∴ The rate of his dad is 1/x car/hr

∵ They working together for 1 hour to wash the car

- The equation of the work is rate of Levi × t + rate of his dad × t = 1

∵ t is the time of working together

∵ t = 1 hour

∴ \frac{1}{2.5}(1)+\frac{1}{x}(1)=1========\frac{1}{2.5}+\frac{1}{x}=1

- Multiply both sides by 2.5x to cancel the denominators

∵ \frac{1}{2.5}(2.5x)=x=====\frac{1}{x}(2.5x)=2.5

∵ 1 × (2.5x) = 2.5x

∴ x + 2.5 = 2.5x

- Subtract x from both sides

∴ 2.5 = 1.5x

- Divide both sides by 1.5

∴ x = 5/3 ≅ 1.67

∵ x is the the time of his dad to wash the car alone

∴ Levi's dad takes 1.67 hours to wash the car by himself

3 0
3 years ago
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Answer:

2(x+1)= 2x+2.

Step-by-step explanation:

Because, there is a on infront of x so you do 2x1=2 so 2x+2 because 2x1=2

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third seat = 15 + 6 = 21
fourth seat = 21 + 6 = 27
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3 years ago
What is the value of m?
Dima020 [189]

\huge \underline \mathcal{Answer}

The given angles forms linear pair, and we know the angles forming linear pair are supplementary,

Therefore,

Angle MHJ + Angle MHL = 180°

Let's solve :

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Value of variable m = 10°

\mathrm{✌TeeNForeveR✌}

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196 plates were used at lunch
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