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3 years ago

Hi can someone PLEASE explain this to me i’m STRUGGLING

Mathematics

2 answers:

skad [1K]3 years ago

5 0

Step-by-step explanation:

Sum of interior angles of a polygon is given by (n-2)180°

where,n is the number of sides.

Since this polygon has 4 sides,

sum of the interior angles = (4-2)180°=360°

x+115°+95°+70°=360°

x°=360°-280°

= 80°

faltersainse [42]3 years ago

4 0

Answer:

x = 80

Step-by-step explanation:

In a quadrilatoral the interior angle sum always adds up to 360 degrees so to find x you would add all of the interior angle sums and subtract that from 360

115 + 95 + 70 + x = 360 just add the like terms

280 + x = 360 now subtract 280 from both sides so x is alone and you can figure out its value

x= 80

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Estimate the answer to 423x0.3

Romashka-Z-Leto [24]

126.9 that’s what i got

6 0

4 years ago

Read 2 more answers

The Eks Survey Company employs 2000 people to conduct telephone surveys. Because many people don't like to answer such surveys,

Kobotan [32]

Use the next formula to find the margin or error:

$MOE=z*\frac{\sigma}{\sqrt{n}}$

z is the critical value (For a 95% confidence level the z-score is 1.95998)

σ is the standard deviation

n is the sample size

$\begin{gathered} MOE=1.95998*\frac{20.4}{\sqrt{36}} \\ \\ MOE\approx6.6639 \end{gathered}$ <h2>Then the margin of error is: 6.6639</h2> $\begin{gathered} \bar{x}\pm MOE \\ \\ 38.6\pm6.6639 \end{gathered}$

5 0

1 year ago

A gardener is planting two types of trees:

Scrat [10]

It will take 4 years for these trees to be the same height

Step-by-step explanation:

A gardener is planting two types of trees:

Type A is 6 feet tall and grows at a rate of 12 inches per year

Type B is 2 feet tall and grows at a rate of 24 inches per year

We need to find exactly how many years it will take for these trees to be the same height

Assume that it will take x years for these trees to be the same height

Type A:

∵ The initial height of the tree is 6 feet

∵ 1 foot = 12 inches

∴ 6 feet = 6 × 12 = 72 inches

∴ The initial height of the tree is 72 inches

∵ It grows at a rate of 12 inches per year

∵ The number of years is x

∴ The height of the tree in x years = 72 + 12 x

Type B:

∵ The initial height of the tree is 2 feet

∴ 2 feet = 2 × 12 = 24 inches

∴ The initial height of the tree is 24 inches

∵ It grows at a rate of 24 inches per year

∵ The number of years is x

∴ The height of the tree in x years = 24 + 24 x

Equate The heights of the two types

∴ 72 + 12 x = 24 + 24 x

- Subtract 2 from both sides

∴ 48 + 12 x = 24 x

- Subtract 12 x from both sides

∴ 48 = 12 x

- Divide both sides by 12

∴ x = 4

It will take 4 years for these trees to be the same height

Learn more:

You can learn more about the word problems in brainly.com/question/10557938

#LearnwithBrainly

3 0

3 years ago

Diana got back her math quiz but Ms. Signer forgot to calculate her final grade. If the quiz had a total of 20 questions on it,

svet-max [94.6K]

Answer:

She made a final grade of 80% or you could say she got 20% of the questions wrong.

5 0

3 years ago

Solve these plz and give a explanation <br>

77julia77 [94]

Answer:

$\large{ \tt{☄ \: EXPLANATION}} :$

✎ Firstly , Remember these things :

To convert the percentage into a decimal fraction, remove the % symbol and divide it by 100 as in the case of conversion of percentage into fraction. We know that , divide by 100 means shifting to the left ; so to convert a percentage into decimal fraction, remove the % symbol and shift the decimal point two places to the left. For example : $12\% = \frac{12}{100} = \boxed{ 0.12}$

$\large{ \tt{☥ \: LET'S \: SOLVE}} :$

$\large{1. \: \: 52\% \: \text{of} \: 210 = \frac{52}{100} \times 210 = 0.52 \times 210 = \boxed{109.2} }$

$\large{ 2. \: \: 35\% \: \text{of} \: 500 = \frac{35}{100} \times 500 = 0.35 \times 500 = \boxed{175} }$

$\large{3. \: 28\% \: \text{of} \: 866 = \frac{28}{100} \times 866 = 0.28 \times 366 = \boxed{102.48} }$

$\large{ \tt{✺ \: REPEAT \: DAILY} }:$

I will remain focused on my goals. Even if I have a moment of difficulty , I will not give up. I know Success comes with consistency. I know that I will make it. Things will get better. No problem or challenge will stop me. Everything I deserve is coming my way.

ツ Hope I helped! ۵

☃ Have a wonderful day / evening! ❃

# StayInAndExplore ! ☂

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7 0

3 years ago