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m_a_m_a [10]
4 years ago
15

How do you solve this using substitution? -x+y=1 x+y=-1

Mathematics
1 answer:
Alexeev081 [22]4 years ago
4 0
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form: (-1,0)
Equation form: x=-1,y=0
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A car drives at a rate of 65 mi/hr. what is the speed of the car in ft/s? note: 1 mi = 5280 ft
lana66690 [7]

Answer:. 95.33 ft/sec

Multiply 65 by 5280 to get 343200 feet per hour. Then Divide by 3600. There are 60 minutes in an hour, and 60 seconds in a minute.

343200 ÷ 3600 = 95.333

Step-by-step explanation:

5 0
3 years ago
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The length of three boards added together is 7.2 meters. The second board is twice the length of the first. The third board is t
Salsk061 [2.6K]

Answer:

Board 1 = 1.2m

Board 2 = 2.4m

Board 3 = 3.6m

Step-by-step explanation:

Board 1 = x

Board 2 = 2x

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4 0
2 years ago
Is -7,964,837 × -7 positive or negative?
Inessa05 [86]
When using both negative symbols, and then multiplying them, this would mean that the numbers would be going up. 

A negative (x's) a negative equals a positive.

Your answer: positive.
6 0
3 years ago
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149 cars are waiting to take a ferry across the channel. Each ferry can only hold 18 cars. How many cars will be on the last fer
STatiana [176]

Answer:

5 cars will be on the last ferry

Step-by-step explanation:

If you divide 149 by 8, you get 8.27.

Since each ferry can hold 18 cars, you multipy 18 by 8 which results in 144. Then you subtract 144 from 149 and you get 5 :)

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3 years ago
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FIFTHEEN POINTS BC I NEED THIS ASAP =
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