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dalvyx [7]
3 years ago
11

You are making candles for your friends. A mold for the candles costs $22.50 and wax to make one candle costs $5. Write an algeb

raic expression for the total cost of making x candles. You make 8 candles. Find the total cost
Mathematics
2 answers:
Mazyrski [523]3 years ago
5 0
Fist you would find how much it would cost for 1 candle which would be 22.5+5=$27.50. Then you would multiply by 8: 27.5×8=$220
Eddi Din [679]3 years ago
3 0

Answer:

y=27.5\cdot{x}

$220

Step-by-step explanation:

If x represents the amount of candles to be made, we can write the expression relating the total cost to make x candles by using the cost of the mold and wax. We know that for one candle, the mold it costs $22.50 and wax costs $5. Therefore:

=22.5+5=27.5

Let y be the total cost of to make x candles:

y=27.5\cdot{x}

For 8 candles x=8:

[tex]y=27.5\cdot{8}=220[/tex]

It will cost $220 to make 8 candles.

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A submarine cruises underwater at 20 km/h and on
Darina [25.2K]

Answer:

System of equations:

20x + 30y = 650

x + y = 25

Time underwater = 10 hours

Time at the surface = 15 hours

Step-by-step explanation:

Let x = time underwater at 20 km/h.

Let y = time on the surface at 30 km/h.

speed = distance/time

distance = speed * time

distance underwater: 20x

distance on the surface: 30y

total distance: 650

20x + 30y = 650

total time: x + y

total time: 25

x + y = 25

20x + 30y = 650

x + y = 25

20x + 30y = 650

-20x - 20y = -500

--------------------------------

          10y = 150

              y = 15

x + y = 25

x + 15 = 25

x = 10

4 0
3 years ago
Please help it is due in an hour
Soloha48 [4]

I now answer but u was a day late sorry

Step-by-step explanation:

8 0
2 years ago
What does the E stand for in 3.1536e+17
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Answer:

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3 0
2 years ago
Read 2 more answers
the bottom of a 22-foot ladder must be placed 7 feet from a wall. to the nearest tenth of a foot, how far above the ground does
Kitty [74]
The ladder, the wall and the floor form together a triangle rectangle, where the ladder is the hypotenuse of the triangle and the floor and wall are the cathetus. We know from Pythagoreas theorem that the square of the hypotenuse is equal to the sum of the two cathetus squared added, so we can write an equation with the data we have:
hyp^2 = cath1^2 + cath2^2
<span>hyp^2 = wall^2 + floor^2
</span>so we have the hypotenuse value, the floor value and the unknown is the wall height:
(22)^2 = wall^2 + (7)^2
484 = wall^2 + 49
wall^2 = 484 - 49 = 435
wall = √435
wall = 20.9
therefore the ladder touches the wall 20.9 feet above the ground
5 0
2 years ago
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