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Julli [10]
3 years ago
15

Substitute 8 for x and evaluate the expression below. 5(x + 1) - 20

Mathematics
2 answers:
fenix001 [56]3 years ago
8 0

Answer:

25

Step-by-step explanation:

Substituting x = 8 into the expression

5(8 + 1) - 20

= 5(9) - 20

= 45 - 20

= 25

My name is Ann [436]3 years ago
8 0

Answer:

25

Step-by-step explanation:

see Image below:)

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An item on scale costs 15% of the original price. The original price was $29
Oxana [17]

Answer:

$4.35

Step-by-step explanation:

because 15% of 29 is 4.35

5 0
3 years ago
acob wanted to buy some ice cream, but did not know what flavor to get so he asked Caitlyn to pick for him. The shop has 4 flavo
LenaWriter [7]

Answer:

1/12 or 1/24 sorry

Step-by-step explanation:

3types * 4 flavors

5 0
3 years ago
What are the solutions of 3(x – 4)(2x – 3) = 0? Check all that apply.
RSB [31]
The answer will 3/2 and 4 :)
8 0
3 years ago
Read 2 more answers
A first number plus twice a second number is 14. Twice the first number plus the second totals 10. Find the numbers.
Nookie1986 [14]

Answer:

first number(x) = 2 second number(y)= 6

Step-by-step explanation:

This is an example of a simultaneous equation.

First write this word problem as equations, where x is the "first number" that you've mentioned and y is the "second number".

x + 2y = 14  (equation 1)

2x + y = 10  (equation 2)

This is solved using the elimination method.

We need to make one of the coefficients the same - in this case we can make y the same. In order to do this we need to multiply equation 2 by 2, so that y becomes 2y.

2x + y = 10 MULTIPLY BY 2

4x + 2y = 20 (this is now our new equation 2 with the same y coefficient)

Now subtract equation 1 from equation 2.

4x - x + 2y - 2y = 20 - 14  (2y cancels out here)

3x = 6

x = 2

Now we substitute our x value into equation 1 to find the value of y.

2 + 2y = 14

2y = 12

y = 6

Hope this has answered your question.

6 0
3 years ago
Read 2 more answers
Solve by completing the square x^2-6x-4=0
Vesna [10]

Answer:

x = 3 ± \sqrt{13}

Step-by-step explanation:

x² - 6x - 4 = 0 ( add 4 to both sides )

x² - 6x = 4

To complete the square

add ( half the coefficient of the x- term)² to both sides

x² + 2(- 3)x + 9 = 4 + 9

(x - 3)² = 13 ( take square root of both sides )

x - 3 = ± \sqrt{13} ( add 3 to both sides )

x = 3 ± \sqrt{13}

6 0
2 years ago
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