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Eva8 [605]
3 years ago
14

A postcard is 4 inches shorter than an envelope. The envelope is 10 inches long. How long is the postcard? The diagram below cou

ld be used to solve this problem. Write and solve an equation to find the length of the postcard.
Mathematics
2 answers:
RoseWind [281]3 years ago
5 0
The post card would be 6inches long

10-4=x
10-4=6
x=6
Pie3 years ago
3 0
10-4 equals 6. The answer is 6inches
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Estimate the solution to the system of equations. 7x−y=7<br><br> x+2y=6<br> ​
ElenaW [278]

Answer:

I am not sure how your teacher wanted you to estimate the answer but I solved it for you. Hopefully this helps.

Step-by-step explanation:

7x-y=7

x+2y=6

14x-2y=14

x+2y=6

add both equations

15x=20

x=20/15

x=4/3

x+2y=6

4/3+2y=6

2y=6-4/3

2y=18/3 -4/3

2y=14/3

divide both sides by 2

y= 14/3 divided by 2

y=14/3(1/2)

y=14/6

2y=

3 0
3 years ago
Which expressions are monomials?
Nimfa-mama [501]

Monomials are the expressions with one terms.

A.) -4+6 = 2

Since, it has only one term. Therefore, it is a monomial.


B.) b+2b+2 = 3b+2

Since, it has two terms. Therefore, it is not a monomial.


C.) (x-2x)^2 = (-x)^2=x^2

Since, it has only one term. Therefore, it is a monomial.


D.) \frac{rs}{2}

Since, it has only one term. Therefore, it is a monomial.


E.) 36x^2yz^3

Since, it has only one term. Therefore, it is a monomial.


F.) a^x

Since, the variable is in the power. So it is not a monomial.


G.) x^\frac{1}{3}

Since, the power is not a integer. Therefore, it is not a monomial.


4 0
3 years ago
Read 2 more answers
The points (1,2),(1,-3),and (5,-3) form a triangle on the coordinate plane. b. What is the perimeter of the triangle?
Alexeev081 [22]
The perimeter of the triangle is 13.56 units.

The perimeter of a shape on a coordinate plane is found by finding the distance between all points, and then adding them together. It's easier to write it out than to type so I'll attach a photo of my work.

8 0
3 years ago
A company is designing a new cylindrical water bottle. The volume of the bottle will be 193 cm cubed 3. The height of the water
Gwar [14]

The radius of the cylinder is 2.92 cm

<u>Explanation:</u>

Given:

Volume of cylinder, V = 193 cm³

Height of the cylinder, h = 7.2 cm

Radius of the cylinder, r = ?

We know:

Volume of cylinder = πr²h

On substituting the value we get:

193 = 3.14 X r^2 X 7.2\\\\r^2 = 8.54\\\\r = 2.92 cm

Therefore, the radius of the cylinder is 2.92 cm

8 0
3 years ago
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How are the side lengths of a polygon and its perimeter related? Use examples to explain
AysviL [449]
The perimeter of a polygon or any shape is just the sum of all of its sides. If you are asked to find the perimeter of a polygon, you would simply just add all the sides together. For example, if a square has 4 sides with the length 2m, the perimeter of that square would be 2m + 2m + 2m + 2m = 8m. Perimeter just means add all the sides.
8 0
3 years ago
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