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Tju [1.3M]
3 years ago
12

Need help plz !!!!!!! Due today

Mathematics
1 answer:
Serggg [28]3 years ago
7 0

Answer:

I know a little of this

Step-by-step explanation:

ok so what you do is for example take both of the small equation with the same variable and equal them to each other then plug in to the other

ex. 7x-31 =5x-8 solve this the plug what you get into the y in equation 4(y) +27

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A jacket originally cost $30.75. It went on sale for 20% off the original price. What was the sale price of the jacket?
gladu [14]
We have to calculate the 20% of $30.75
The 20% of $30.75=(20/100)*$30.75=(20*$30.75)/100=$6.15

The sale price of the jacket was $6.15.
6 0
3 years ago
A carpenter has a wooden dowel that is 72 centimeters long. She wants to cut it into 2 pieces so that one piece is 5 times as lo
Jobisdone [24]
Let's say that the shorter piece is x and the longer piece is 5x (because it's 5 times as long). x+5x=72 and 6x=72. Dividing both sides by 6, we get that x=12, and 72-12=the length of the other piece (since there are only 2 pieces)=60
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3 years ago
Truck brakes can fail if they get too hot. In some mountainous areas, ramps of loose gravel are constructed to stop runaway truc
pickupchik [31]

Kinetic engery = -1/2mv^2

Work = Fd

Combine:

-1/2mv^2 - Fd = 0

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Multiply both sides by 2:

v^2 = 2d(0.30*9.81*cos(6))

Solve for d:

d=v^2 / 2(0.30*9.81*cos96))

v = speed:

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d = 1225 / 5.85376

d = 209.27 meters. Round answer as needed.

7 0
3 years ago
During second period, Janet completed a grammar worksheet.
Dmitry_Shevchenko [17]

Answer: 50%

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
The radius of a circle is 18 inches. A snail crawls along the diameter of the circle at a rate of 3 inches per minute. How long
yuradex [85]

Answer:

12 minutes

Step-by-step explanation:

The radius is half the diameter, so 18*2 = 36 inches

The diameter is 36 inches.

Divide the diameter by the rate, 36/3 = 12 minutes

Your answer is 12 minutes

6 0
3 years ago
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