3 years ago

Find the value of x and y. y=2x and 1.85x+3.7y=12.95

Mathematics

1 answer:

Len [333]3 years ago

3 0

Answer:

x=1.4 y=2.8

Step-by-step explanation:

Lets substitute y with 2x. We get: 1.85x+7.4x=12.95.

Simplifying by combining x: 9.25x=12.95

Then you just divide 12.95 by 9.25: x=1.4

Now for y. We know why is 2x so we just have to multiply x by 2: y=2x, y=2.8.

You might be interested in

Evaluate y = 5x + 1 when x= 2

mojhsa [17]

Answer:

The answer is 11, hope i helped!

8 0

3 years ago

32) Find the value of 5x° + 2x-1 when x = 4.

SashulF [63]

Answer:

5x4°x7

Step-by-step explanation:

5x°+2x-1 when x =4

5x4°+2x4-1

5x4°+8-1

=5x4°x7

5 0

3 years ago

The ratio of the perimeter of two similar polygons is 5:7. The area of the smaller polygon is 30 sq. cm. Find the area of the la

Debora [2.8K]

Answer:

42sq

Step-by-step explanation:

5:7

30 sq: x sq

30/5=6 sq for 1 of the ratio

6*7=42 sq for 7 of the ratio

4 0

3 years ago

Nancy put new insulation in her attic and discovered that her heating bill for December decreased from $160 to $100. What is the

WINSTONCH [101]

Answer:

37.5% decrease

Step-by-step explanation:

To find a relative percentage you generally follow the rule of part divided by whole.

$100 / $160 = .625 (62.5%)

So $100 is 62.5% of $160

To find the decrease we need to subtract 62.5% from 100%

100 - 62.5 = 37.5

4 0

2 years ago

7+(-3)+(-5)-10<br>how do i simplify

4vir4ik [10]

Answer:

-11

Step-by-step explanation:

7 - 3 - 5 - 10

4 - 5 - 10

- 1 - 10

-11

8 0

3 years ago