All categories

3 years ago

Explain how to add linear expressions without using numbers in you explanation.

Mathematics

1 answer:

yanalaym [24]3 years ago

6 0

Answer:

Like terms

Same number of equations as unkowns

Step-by-step explanation:

To add linear equations you need the amount of equations to match the number of unknowns.

The equations must have like terms.

All like terms will be added to each other and might even cancel out and solve one term if equal terms have opposite signs.

You might be interested in

Solve the following system : -x + 5y = 8 and 3x + 7y = -2

poizon [28]

-x + 5y = 8

multiply this equation by 3

-3x + 15y = 24

now add it to the other equation ( elimination)

-3x + 15y = 24

3x + 7y = -2

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

0x + 22 y = 22

divide each side by 22

y =1

substitute into -x + 5y =8 to find x

-x + 5(1) = 8

-x + 5 = 8

-x =3

divide by -1

x =-3

Answer (-3,1)

Choice A

4 0

3 years ago

Target is having a huge winter season sale on all of their televisions. A 42in screen tv that usually retails at $580 is marked

torisob [31]

Answer: You do not because the tv costs $464.

Step-by-step explanation:

First find out how much 20% of 580 is:

= 20% * 580

= $116

The television was therefore marked down by $116. The current selling price is:

= 580 - 116

= $464

<em>Since you came with $450, you will not be able to buy the television as you would be short of the $464 required. </em>

3 0

3 years ago

A certain triangle has two 45° angles. What type of triangle is<br> it?

wariber [46]

Answer:

an acute triangle

Step-by-step explanation:

an acute triangle has angles that are less than 90 degrees

right triangles have a right angle

obtuse triangles have angles greater than 90 degrees

5 0

3 years ago

Greg's grandmother is knitting scarves for charity. The table shows the number of yards needed for different types of scarves.

Cerrena [4.2K]

The charity will make $367 and 5 cents

3 0

2 years ago

Read 2 more answers

HELP Sam measures the height of 7 different scoops of ice cream. The mean of the heights was 3.8 cm. Which of the following best

OLga [1]

Sam measures the height of 7 different scoops of ice cream. The mean height was 3.8 cm. If all the scoops are evenly distributed, they would all be 3.8 cm tall.

<h3>How to find the mean value of a data set?</h3>

The mean value of the data set is the ratio of the sum of the data set's values to the number of values it has.

If the data set consists of values

x_1, x_2, ..., x_n

, then we get the mean value as:

$\overline{x} = \dfrac{x_1 + x_2 + \cdots + x_n}{n}$

Sam measures the height of 7 different scoops of ice cream. The mean height was 3.8 cm.

$\overline{x} = \dfrac{x_1 + x_2 + \cdots + x_n}{n}$

mean= $\dfrac{(a+b+c+d+e+f+g)}{7}$

Therefore, If all the scoops are evenly distributed, they would all be 3.8 cm tall.

Learn more about mean;

brainly.com/question/23008823

#SPJ2

8 0

2 years ago

Read 2 more answers