2 years ago

Need help on this question please x-7y=10 and 2x+14y=21

Mathematics

1 answer:

dalvyx [7]2 years ago

5 0

Answer:

x=7y+10

Step-by-step explanation:

x−7y=10

x−7y+7y=10+7y

x=7y+10

Answer:

x=−7y+21/2

12/2 is a fraction

Step-by-step explanation:

2x+14y=21

2x+14y+−14y=21+−14y

2x=−14y+21

2x2=−14y+21/2

x=−7y+21/2

You might be interested in

A carpenter leans a 20-foot ladder against a building so that an angle of 60° is formed between the ladder and the ground. How m

iogann1982 [59]

Answer:

The foot of the ladder is

feet away from the base of the wall.

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Expand and simplify<br> (x – 3)(2x - 2)

vekshin1

Answer:

2x^2 - 8x + 6

Step-by-step explanation:

2x*x+(-3x*2x)+(x*(-2))+6=

2x^2-8x+6

6 0

2 years ago

Sam needs at least 78 credits to get his college degree. At the end of his third year, Sam has a total of 52 credits. Which ineq

Sergio039 [100]

Answer:

C + 52 ≥ 78

Step-by-step explanation:

Since Sam needs at least 78 credits to a college degree, the inequality is represented by a more than or equal to symbol (≥).

7 0

3 years ago

A student gets 68 marks n therefore gets 85 percent total marks are?

mihalych1998 [28]

Answer:

There are 80 marks in total.

Step-by-step explanation:

Let the number of total marks be $x$ .

The percentage score of the student can be written as the ratio

$\displaystyle \frac{68}{x} = 85\%$ .

However,

$\displaystyle 85\% = \frac{85}{100}$ .

Equating the two:

$\displaystyle \frac{68}{x} = \frac{85}{100}$ .

Cross-multiply (that is: multiple both sides by $100x$ , the product of the two denominators) to get

$85x = 68\times 100$ .

$\displaystyle x = \frac{68\times 100}{85} = 80$ .

In other words, there are 80 marks in total.

4 0

3 years ago

A family uses two 500ml packets of

Genrish500 [490]

A !.!.!.!.!.!.!.!.!.!!.!.!.!.!.!..!!.!.!.!.!.!.!.!.!.!.?

8 0

2 years ago