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polet [3.4K]
3 years ago
15

Can an angle ever have the same measure as its complement? Explain.

Mathematics
1 answer:
sineoko [7]3 years ago
8 0
It can because complimentary angles are angles that equal to 90. 45+45+90, therefor two angles can have the same degree
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Y + 4x = 8 and 5x + 2y = 13
Ivanshal [37]
Y + 4x = 8
y = 8 - 4x
substitute 8 - 4x for y in the other equation.
5x + 2(8 - 4x) = 13
5x + 16 - 8x = 13
-3x = -3
x = 1
y = 8 - 4(1) = 4
4 0
3 years ago
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
Read 2 more answers
Divide £50 in the ratio of 1:4
NikAS [45]
Answer=10:40


Explanation:

Don’t know how to type the symbol in font of the 50 so I will substitute
£50=$50

So 1:4
Add it up
1+4=5

So 5 total units
$50=5
Divided by 5
$10=1 units

So 1:4=10:10 times 4=10:40
6 0
3 years ago
I need help on .5 and .6
Dovator [93]
5. 44 (forty four)
6. 58
8 0
3 years ago
Im confused <br><br><br> khan academy 8th grade
Anit [1.1K]

Answer:

14

Step-by-step explanation:

hi! so the question is asking what h is when you input -18 for x, right?

inputing in this question means to substitute, meaning that in this equation, -18 will take the place of x!

  • let's see what the equation looks like now
  • h = 17 + \frac{-18}{6}
  • easy as that!

now let's do the math :)

  • because of PEMDAS, remember to do the fraction (dividing) first!
  • h = 17 + (-3)

we can change that to --> h = 17 - 3

h = 14

let me know if you're still confused!

7 0
2 years ago
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