All categories

3 years ago

Solve for x please help

Mathematics

1 answer:

Agata [3.3K]3 years ago

6 0

Step-by-step explanation:

4x + 2 + 3x + 3 = 180 (straight angle)

4x + 3x + 2 + 3 = 180

7x + 5 = 180

7x = 175

x = 25°

You might be interested in

Calculate the number of subsets and the number of proper subsets for the set.

arlik [135]

A set of n elements has 2ⁿ subsets. One of these subsets is the set itself, so this set would have 2ⁿ - 1 <em>proper</em> subsets.

The given set has 4 elements, so it has 2⁴ = 16 subsets and 2⁴ - 1 = 15 proper subsets.

Just to illustrate the claim, we have

• subsets of size 0 (1 of these):

{ } (empty set)

• subsets of size 1 (4 of these):

{1/6}, {1/7}, {1/8}, {1/9}

• subsets of size 2 (6 of these):

{1/6, 1/7}, {1/6, 1/8}, {1/6, 1/9}, {1/7, 1/8}, {1/7, 1/9}, {1/8, 1/9}

• subsets of size 3 (4 of these):

{1/6, 1/7, 1/8}, {1/6, 1/7, 1/9}, {1/6, 1/8, 1/9}, {1/7, 1/8, 1/9}

• subsets of size 4 (1 of these):

{1/6, 1/7, 1/8, 1/9}

and the last one is the only subset that is not a proper subset, because that subset = the set.

6 0

2 years ago

What is the solution to the system of equations y= -5x + 30<br> X=10

Verizon [17]

Answer:

y = -5x + 30

X = 10

Hope this helps! :]

3 0

3 years ago

Read 2 more answers

The standard deviation for a set of data is 7.5. The mean is 235. What is the margin of error?

blondinia [14]

The margin of error is 0.97849

we are given

mean=235

so,

$n=235$

standard deviation =7.5

so,

$\sigma=7.5$

we know that

ME=2*standard error

and

$SE=\frac{\sigma }{\sqrt{n} }$

If confidence level is 95%, then we can multiply by 1.96

so, we can multiply by 2 to get ME

now, we can use marginal error formula

$ME=\frac{2\sigma }{\sqrt{n} }$

now, we can plug values

and we get

$ME=\frac{2\times 7.5 }{\sqrt{235} }$

$ME=0.97849$

7 0

3 years ago

Read 2 more answers

What are the factors of the trinomial?

marissa [1.9K]

Part A x^2-3x -4
Part B x^2 +3x -4
Party C x^2+x-20
Part D x^2-x-20

7 0

2 years ago

If 8 is added to a certain number, the result is 34. Write an equation to describe this situation.

makkiz [27]

Answer:

x + 8 = 34

Step-by-step explanation:

Hope it helps.

3 0

3 years ago

Read 2 more answers