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3 years ago

Complete the table of values for x + 2y = 7

Mathematics

1 answer:

inn [45]3 years ago

4 0

Your answer is x = 7 – 2y

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Which fractions are equivalent to 1/5?

Anit [1.1K]

Answer:

2/10&20/100

Step-by-step explanation

hope it helps

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2 years ago

Read 2 more answers

What does -x+y=-4 equal

zavuch27 [327]

Answer:

x=y+4

Step-by-step explanation:

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2 years ago

The difference between two numbers is 31. Four times the smaller is equal to eight more than the larger. What are the numbers?

hjlf

Answer:

13 and 44

Step-by-step explanation:

let x and y be the 2 numbers with y < x , then

x - y = 31 ( add y to both sides )

x = y + 31 ( subtract 31 from both sides )

x - 31 = y → (1)

4y = x + 8 → (2)

substitute y = x - 31 into (2)

4(x - 31) = x + 8

4x - 124 = x + 8 ( subtract x from both sides )

3x - 124 = 8 ( add 124 to both sides )

3x = 132 ( divide both sides by 3 )

x = 44

substitute x = 44 into (1)

44 - 31 = y , then

y = 13

the 2 numbers are 13 and 44

3 0

2 years ago

A ship sailed 30 kilometers in 1 1/2 hours. What is was its rate in kilometers per hour?

PilotLPTM [1.2K]

Answer:

20km/hr

Step-by-step explanation:

Given that a ship sailed 30km in one and a half hours. We need to find out the rate of ship in kilometres/hour . The rate is also called Speed.

Speed:- Distance travelled per unit time is called Speed .

Here , according to Question,

Distance = 30 km

Time = 1½ hrs .

We know that ,

$\rm\implies Distance = Speed \times Time$

Subsequently ,

$\rm\implies Time = \dfrac{Distance}{Time}$

Substitute the respective values ,

$\rm\implies Rate =\dfrac{ 30km}{ 1.5 hrs }$

We can write 1.5 as 3/2 , therefore ,

$\rm\implies Rate = \dfrac{ 2\times 30}{3} km/hr$

Simplify the RHS ,

$\rm\implies\boxed{\blue{\rm Rate = 20\ km/hr}}$

Hence the Rate/Speed of the ship is 20km/hr .

8 0

3 years ago

Solve 9x - 12 - 8x - 3

Igoryamba

X-5

First combine like terms:
X-12-3

Then calculate difference:
X-5

8 0

3 years ago