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MA_775_DIABLO [31]
3 years ago
13

Andy incorrectly solved an equation and showed his work.

Mathematics
1 answer:
antoniya [11.8K]3 years ago
6 0
The answer is A. this is because when andy distributed the 5 from the outside of the parenthesis to the inside, he multiplied 5•5 to equal 10, and 5•5 is 25.
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Plz help whats alex error i beg help i will give 19 points and brainlist
Alenkasestr [34]

Answer:

Alex timed 7 by 2 instead of 7 times 7 because 7^2 is an exponent.

7 0
3 years ago
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The length of one side of a triangle is 2 feet less than three times the length of its second side. The length of the third side
Zanzabum

Using a system of equations, it is found that the lengths of the sides of the triangle are given as follows:

0.91 feet, 0.73 feet, 1.23 feet.

<h3>What is a system of equations?</h3>

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

In this problem, the variables are the lengths, given by x, y and z.

The length of one side of a triangle is 2 feet less than three times the length of its second side, hence:

y = 3x - 2.

The length of the third side is 3/4 of the sum of the lengths of the first two sides, hence:

z = \frac{3(x + y)}{4} = \frac{3(4x - 2)}{4}

The perimeter of the triangle is 17.5 feet, hence:

x + y + z = 17.5

x + 3x - 2 + \frac{3(4x - 2)}{4} = 17.5

4x + \frac{3(4x - 2)}{4} = 19.5

16x + 12x = 25.5

x = 25.5/28

x = 0.91.

Then the other sides are:

  • y = 3x - 2 = 3(0.91) - 2 = 0.73 feet.
  • z = \frac{3(4 x 0.91 - 2)}{4} = 1.23 feet

More can be learned about a system of equations at brainly.com/question/24342899

#SPJ1

4 0
2 years ago
I need help!!!!<br><br> The square below has the given side lengths. x is positive
Hoochie [10]

Answer:

Value of X: X=2

Length of One Side: 31

Area: 961u^2

Perimeter: perimeter = 124

Step-by-step explanation:

Set the sides equal to each other, simplify and then use quadratic equation. One result is positive and the other is negative, shape's sides have to be positive so use the positive value for X.

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The lengths of the sides of a triangle are given below. Classify the triangle as acute, obtuse, or right.
enot [183]

Answer:

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Step-by-step explanation:

<u>Use Pythagorean to identify if the triangle is right:</u>

  • 9² = 7² + 3²
  • 81 = 58

We see the triangle is <u>not </u>right and the difference of the squares tells us the angle opposite to side with measure of 9 is greater than 90°.

It means the triangle is <u>obtuse</u>.

Correct choice is B

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According to the manufacturer, about 26% of sour candy in a package of Sandy's Sours are grape. What is the probability that the
maria [59]
D is the correct answer
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