All categories

4 years ago

Pleeeeaaaseee help!!

Mathematics

1 answer:

PSYCHO15rus [73]4 years ago

3 0

Answer:

Step-by-step explanation:

The equation is 3x - 5y =20.

Suppose we start with (5, y). What value of y is a solution of this equation?

Substitute 5 for x in 3x - 5y =20, obtaining: 3(5) - 5y = 20.

Then -5y = 5, and y = -1. Thus, (5, -1) is a solution of 3x - 5y =20.

We have (x, 2). Find the value of x that makes (x, 2) a solution of 3x - 5y =20.

Replace y with 2: 3x - 5(2) =20

Then 3x = 30, and x = 10. So (10, 2) is a solution of 3x - 5y =20.

You might be interested in

What is the measure of X ?

viktelen [127]

Answer:

Step-by-step explanation:

Since 88 and the angle inside the triangle right next to it are a linear pair, their measure must add up to 180 degrees. Therefore, that angle's measure must be 180-88=92 degrees. Since all of the interior angles of a triangle must add up to 180 degrees as well, 50+92+x=180, meaning that x=180-92-50=38 degrees. Hope this helps!

3 0

4 years ago

Read 2 more answers

Que tres numeros impares suman 30

emmainna [20.7K]

7.5 + 9.5 + 13 = 30 <=== 3 odd numbers that equal 30...
<span>no te conozco otra forma , excepto para usar decimales</span>

6 0

3 years ago

Pilar and Ravi start at opposite ends of a 55-mile bike trail. They start riding their bikes toward each other at the same time.

Lynna [10]

Answer:

Ravi’s average speed is 7 miles per hour

Step-by-step explanation:

In this question, we are tasked with calculating what Ravi’s average speed was.

We must know that the term average speed is mathematically equal to Total distance/ Total time

We already have the time of 3 hours, what is needed is the distance.

From the question, we can see that they met at the point where Pilar had travelled 55 miles. What this means is that Ravi would have traveled (55-34) miles to this point since they are coming in opposite direction. This means that Ravi had traveled 21 miles

Thus his average speed is 21 miles/ 3 hours = 7 miles per hour

6 0

4 years ago

Select two values that can replace

svp [43]

Answer:

D and B

Step-by-step explanation:

Just solve each one

3 0

3 years ago

Win bakes fruit bars in a pan shaped like a rectangular prism. The volume of the pan is 120 in³. The length of the pan is 8 in.,

krok68 [10]

V=LWH

120=8(1.5)W

12W=120

W=10in

8 0

3 years ago