Use the order of operations to evaluate the expression below. 5 + 7 • 2 - 90 / 3 + 8 - 1

1 answer:

3 0

First Multiply 7x2 witch is 14 then divide -90 by 3 witch is -30 so now make your new equation 5+14-30+8-1 witch the answer is -4

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Find an ordered pair (x, y) that is a solution to the equation.<br> 3x-y=5

alisha [4.7K]

Answer:

(2,1) is an example of an ordered pair that is a solution to the equation.

Step-by-step explanation:

We are given the following equation:

$3x - y = 5$

Finding a solution:

To find an ordered pair (x,y) that is a solution to this equation, first we attribute a value to one of the variables, and then replace in the equation and find the other.

I am going to attribute $y = 1$

$3x - y = 5$

$3x - 1 = 5$

$3x = 6$

$x = \frac{6}{3}$

$x = 2$

(2,1) is an example of an ordered pair that is a solution to the equation.

5 0

2 years ago

Can omeone help i cant solve this

Bumek [7]

Answer:

the answer is forty five

5 0

3 years ago

There is a sales tax of $6 on an item that costs $63 before tax. A second item costs $210 before tax. What is the sales tax on t

Law Incorporation [45]

The first thing you should do in this case is calculate the tax percentage.
We then have to apply the following rule of three:
$ 63 ----> 100%
6 $ ------> x
Clearing x we have:
x = (6/63) * (100)
x = 9.523809524%
Therefore the taxes of the second item will be
Tax = (9.523809524 / 100) * 210
Tax = 20 $
Answer:
The sales tax on the second item is:
Tax = 20 $

7 0

3 years ago

The endpoints of DE and D(-3, y) and x, 6). The midpoint of DE is M(4,2). What is the length of DE.

Natasha_Volkova [10]

If the endpoints of DE where D(-3, y) and E(x, 6) with the midpoint M(4, 2), the length of DE is 16.12 units

The formula for calculating the midpoint is expressed as;

$M(x,y)=(\frac{x_1+x_1}{2}, \frac{y_1+y_2}{2})$