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lions [1.4K]
4 years ago
13

Timmy bought a skateboard and two helmets for a total of

Mathematics
1 answer:
Pie4 years ago
4 0
D-2h=cost of skateboard
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The cost of petrol rises by 2 cents a liter. Last week a man bought 20 liters at the old price. This week he bought 10 liters at
In-s [12.5K]

Answer: the old price for 1 liter is $0.3

Step-by-step explanation:

Let x represent the old price for 1 liter of petrol.

Last week a man bought 20 liters at the old price. This means that the total amount that the man paid for 20 liters is 20x.

The cost of petrol rises by 2 cents a liter. This means that the new price per liter is x + 2/100 = x + 0.02

This week he bought 10 liters at the new price. This means that the total amount that the man paid for 10 liters is

10(x + 0.02)

= 10x + 0.2

Altogether, the petrol costs $9.20. This means that

20x + 10x + 0.2 = 9.2

30x + 0.2 = 9.2

30x = 9.2 - 0.2

30x = 9

x = 9/30

x = 0.3

3 0
3 years ago
I need help with numbers 17 and 11. worksheet down below :) thank you. I'm using all my points so let this be the time I use my
Rashid [163]

Answer:

12-8+3 for the numerical and 2x=3y-6 for the algebraic expression

Step-by-step explanation

Numerical expression consists of numbers and one operation

Algebraic expression consist of multiple varaibles  and constents

6 0
3 years ago
Read 2 more answers
What are the factors of 12x^3y^3--24x^2y^3<br><br> Factor completely and show work.
Fed [463]
Already factored:

Factors of 12X^3y^3 - 24x^2y^3

Answer:

The Factors of 12 are: 1, 2, 3, 4, 6, 12


The factor pairs of 12 are: 
1(12) = 12
2(6) = 12
3(4) = 12


Hope this helps.!!!
5 0
3 years ago
Read 2 more answers
A triangular pyramid is formed from three right triangles as shown below.
Bess [88]

Answer:

  FH = 108

Step-by-step explanation:

The given figure requires we use the Pythagorean theorem to write two relations involving right triangle side lengths. The Pythagorean theorem tells us the square of the hypotenuse is the sum of the squares of the other two sides.

__

<h3>Triangle EGH:</h3>

  EG² = GH² +HE²

  GH² = EG² -HE² = 53² -28² = 2025 . . . . . solve for GH², use given values

<h3>Triangle FGH:</h3>

  FG² = GH² +FH²

  FH² = FG² -GH² = 117² -2025 = 11664 . . . . solve for FH², use known values

  FH = √11664 = 108 . . . . . take the square root

The length FH is 108.

6 0
3 years ago
Need help with this one as well. I wasn't sure so I went with C.
disa [49]

convergent is |r|>1

so the answer would have to be less that 1.

answer is A.


6 0
3 years ago
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