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AfilCa [17]
3 years ago
13

What is the value of a? a = ?

Mathematics
2 answers:
Tatiana [17]3 years ago
6 0

Answer:

  a = 15

Step-by-step explanation:

The Pythagorean theorem applies:

  a² + 20² = 25²

  a² = 625 - 400 . . . . . subtract 20²

  a = √225 . . . . . . . . . . take the square root

  a = 15

_____

You might recognize that the given measures (20, 25) are in the ratio 4:5. There is only one right triangle with sides in that ratio: the 3:4:5 right triangle. That is, the unknown side (a) matches

  a : 20 : 25 = 3 : 4 : 5 . . . . numbers on the left are 5 times those on the right

  a = 5·3 = 15

Stella [2.4K]3 years ago
4 0
The correct answer is 15.
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Given the figure above, if​
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Answer:

67

Explanation:

the angle labeled 10 which is =113 and the angle labeled 11 are co interior angles.

co interior angles add upto 180 therefore to get the value of the angle labeled 11 you subtract 113 from 180 which gives you 67

the angle labeled 11 which is =67 and the angle labeled 8 are alternate angles. Alternate angles are equal therefore the value of the angle labeled 8 which you've been asked to give is 67

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A house painting company charges $376 plus $12 per hour. Another painting company charges $280 plus $15 per hour. a. How many ho
notka56 [123]
M: cost per hour
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x: hours (h)
To make both company to charge the same amount:
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3 0
3 years ago
what is the smallest of three consecutive integers i the sum of the smaller two integers is two more than seven times the larges
NNADVOKAT [17]

Answer:

The numbers that meet these conditions are -3, -2 and -1.

This means that the wording of the question is somewhat ambiguous:

The <em>lowest</em> of the three numbers is -3.

The <em>smallest</em> however is -1.

You may need clarification on which of those is being asked for.

Step-by-step explanation:

Let's call those numbers a, b and c, with a the smallest and c the largest. We're told two key things here:

1) The sum of the smaller two integers is two more than seven times the largest integer.  In other words a + b = 7c + 2

2) We're looking for three consecutive integers, which means that we can define them with a single variable.  If the smallest one is a, then the others are a + 1 and a + 2.

We can take those and put them together, giving us the equation:

a + (a + 1) =  7(a + 2) + 2

Which we can then solve for a:

a + (a + 1) =  7(a + 2) + 2

2a + 1 = 7a + 14 + 2

2a - 7a = 14 + 2 - 1

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a = -3

Since a is -3 and also the smallest, we can then say that the numbers are -3, -2 and -1.

3 0
3 years ago
Write the quadratic equation and solve by using the general formula. "Find two consecutive numbers in which the double of the sq
Elis [28]

Answer: 6 and 7

Step-by-step explanation:

Let the numbers be x and x + 1

We can form and equation as:

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Therefore, x - 6 = 0

x = 0 + 6

x = 6

The numbers are 6 and 7

6 0
3 years ago
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