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VLD [36.1K]
3 years ago
7

Write an equation for the description. Ten times the sum of half a number x and 5 is 8.

Mathematics
1 answer:
NikAS [45]3 years ago
3 0

10(1/2X + 5) = 8

Happy to help! Please mark me as the brainliest!

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Solve the system of equations.<br> – 5x + 2y = 9<br> y = 7x<br><br> X =<br> Y =
Sphinxa [80]

Answer:

<em> x−y = 9 , x + y = 6</em>

<em>x + y = 4  ,  x − y = 2</em>

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<em>try out these examples?</em>

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A triangle has sides with lengths 5, 12, and 13. Verify this is a Pythagorean triple. Approximate the acute angles in this trian
djyliett [7]

A triangle with lengths 5, 12, and 13 is a Pythagorean triple

The approximate acute angles are 22.6° and 67.4°

Pythagorean triple

Pythagorean triple consist of positive number(a, b, c) such that it obeys the rule:

  • c² = a² + b²

A triangle whose sides form a Pythagorean triple is called a right angle triangle.

The longest side is the hypotenuse side.

Therefore,

  • 5² + 12²
  • 25 + 144 = 169
  • √169  = 13

Therefore,

5² + 12² = 13²

This means the triangle is a Pythagorean triple.

<h3>Acute angles</h3>

Acute angles are angles that are less than 90 degrees. This means the other two angles are acute angle.

Therefore, let's find them

  • tan ∅ = opposite / adjacent = tan ∅ = 5 / 12 = ∅ = 22.6198649155 = 22.6°
  • 180 - 22.6 - 90 = 67.4°

learn more on Pythagorean triple here: brainly.com/question/2293263?referrer=searchResults

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2 years ago
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Given: f(x) = 3x2 + 2x – 1
denis-greek [22]

Answer:

84

Step-by-step explanation:

f(x) = 3x^2 + 2x – 1

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f(5) = 3(5)^2+2(5) -1

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    = 85 -1

4 0
3 years ago
Erin’s car uses 6 gallons of gas for every 138 miles she drives. Which equation could be used to find how many gallons,g, Erin n
alina1380 [7]

Answer:

g = 6 / 3 x 2

Step-by-step explanation:

g = 6 / 3 x 2 because 92 / 2 = 46. 46 x 3 = 138. so / 3 = 46 x 2 = 92

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1 year ago
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