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Sholpan [36]
3 years ago
13

How to solve this equation and check it. a - 2.5 = 4.5?

Mathematics
1 answer:
Bezzdna [24]3 years ago
5 0

Answer:

Step-by-step explanation:

a - 2.5 = 4.5

     2.5 = 2.5

a = 7.0 or 7

7.0 - 2.5 = 4.5

4.5 = 4.5

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2x-3y=3 5x+2y=17<br> how do i solve this?
Alina [70]
<span> 2(2x-3y=3)..................4x-6y=6..........equation 1
 3(5x+2y=17) ...........15x+6y=51</span>........equation 2

adding equation 1 and equation 2;
19x=57
   x=3

2x-3y=3
(2*3)-3y=3
6-3=3y
y=1

6 0
4 years ago
Which number is composite?<br> 31<br> 43<br> 37<br> 49
Alina [70]

A composite number is one that can be made by multiply two numbers to each other. Since 49=7*7, 49 is a composite number.

Check:

You can check a multiplication chart, but you will see that 49 is the only one that can be multiplied by 2 numbers

4 0
3 years ago
Evaluate 5^-4<br> A.1/625<br> B.-1/625<br> C.625<br> D.-625
Vaselesa [24]

Answer:

A

Step-by-step explanation:

that's the right answer

8 0
3 years ago
Pls pls pls help i rlly need the asnwer soon
anygoal [31]

Answer:

(1. 5

(2. 180

(3. 900

(4. 5180=900

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Based on the graphs of the equations y = –2x + 3 and y = x2 – x + 1, the solutions are located at points:
Ray Of Light [21]

The solutions of the equations are the point of intersection of the equations

The solutions are located at points (-2,7) and (1,1)

<h3>How to determine the solutions?</h3>

The equations are given as:

y = –2x + 3 and y = x2 – x + 1

Next, we plot the graph of both equations

From the graph of the equations (see attachment), we have the solution to be:

(x,y) = (-2,7) and (1,1)

Hence, the solutions are located at points (-2,7) and (1,1)

Read more about system of equations at:

brainly.com/question/14323743

8 0
2 years ago
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