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motikmotik
2 years ago
12

Solve for x. pls help !!!!!

Mathematics
1 answer:
yanalaym [24]2 years ago
5 0

Answer:

x=5

Step-by-step explanation:

Put everything on one side of the equation and have it equal to 180 degrees.

13x+3+72+8x= 180

Combine like terms

21x+75= 180

Subtract 75 on both sides

21x = 105

Divide by 21 on both sides

x= 5

hope this helped!

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Solve the system of equations<br><br> system
Korolek [52]

Answer:

(3, 3 )

Step-by-step explanation:

Given the 2 equations

3x - y = 6 → (1)

6x + y = 21 → (2)

Adding the 2 equations term by term will eliminate y, that is

(6x + 3x) + (y - y) = (21 + 6), that is

9x = 27 (divide both sides by 9 )

x = 3

Substitute x = 3 into either (1) or (2) and solve for y

Using (2), then

(6 × 3) + y = 21

18 + y = 21 ( subtract 18 from both sides )

y = 3

Solution is (3, 3 )

8 0
4 years ago
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The smaller triange was dilated to form the larger triangle. What is the value of x?
natka813 [3]

Answer:

x = 14

Step-by-step explanation:

As we can see that the bottom side is equivalent to 3 of the smallest triangle and the side of the larger triangle is equivalent to the 9

This represents that it is dilated by 3 factor

So

= 3 × 3

= 9

Now the other side i.e. 5 of the smallest triangle also need to be dilated by a 3 factor

So the new side is 15

Also the largest triangle is x + 1

So,

15 = x + 1

x = 14

4 0
3 years ago
A snail can crawl 2/5 of a meter in a minute. How many minutes will it take the snail to crawl 6 meters? Enter your answer in th
Varvara68 [4.7K]
6 / (2/5) = 15
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6 0
3 years ago
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In a set of 3 numbers the first is a positive integer, the second is 3 more than the first and the 3rd is a square of the second
Molodets [167]

Given:

In a set of 3 numbers the first is a positive integer, the second is 3 more than the first and the 3rd is a square of the second.

To find:

The equation for the given situation if the sum of the numbers is 77.

Solution:

a. Let the first number in the set is x.

The second is 3 more than the first. So, the second number is (x+3).

The 3rd number is a square of the second. So, the third number is (x+3)^2.

Therefore, the first, second and third numbers are x,(x+3),(x+3)^2 respectively.

b. The sum of the numbers is 77.

First number + Second number + Third number = 77

c. So, the equation in terms of x is:

x+(x+3)+(x+3)^2=77

Therefore, the required equation is x+(x+3)+(x+3)^2=77.

d. On simplification, we get

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x^2+(6x+x+x)+(3+9)=77

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Subtract 77 from both sides.

x^2+8x+12-77=77-77

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Therefore, the simplified form of the required equation is x^2+8x-65=0.

6 0
3 years ago
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tigry1 [53]

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Step-by-step explanation:

The more left you go on a number line the smaller it is

7 0
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