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Elina [12.6K]
2 years ago
14

Find the number a for which x=5 is a solution of the given equation.

Mathematics
1 answer:
vfiekz [6]2 years ago
3 0

Step-by-step explanation:

x + 8a = 25 + ax - 7a

x = 5

5 + 8a = 25 + 5a - 7a

5 + 8a = 25 - 2a

5 + 10a = 25

10a = 20

a = 2

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Factor completely 5x2 − 50x + 120.
BartSMP [9]

Answer:

<h2>Q1. d. 5(x - 4)(x - 6)</h2><h2>Q2. b. (8x - 1)(8x + 1)</h2>

Step-by-step explanation:

\bold{Q1}\\\\5x^2-50x+120=5(x^2-10x+24)=5(x^2-6x-4x+24)\\\\=5\bigg(x(x-6)-4(x-6)\bigg)=5(x-6)(x-4)\\\\\bold{Q2}\\\\64x^2-1=(8x)^2-1^2=(8x-1)(8x+1)\\\\\text{Used}\ a^2-b^2=(a-b)(a+b)

8 0
3 years ago
Read 2 more answers
Samara buys a video game for $56.00 she also buys a book. The price of video game is 8 times as much as the price of the book. W
igor_vitrenko [27]
The answer is $7.00 because 56.00/8=7.00.
Hope that helps.
4 0
3 years ago
Read 2 more answers
Can someone please help me with this one? Oh and in the boxes I need to put a number NOT a check mark.
kari74 [83]
Grade 7 : Yes = 2 , No = 3
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3 0
3 years ago
The length of the side sqaure A is 50% OF THE LENGTH OF THE SIDE SQUARE b
UNO [17]

Let's say the side length of square A is x, which means the side length of square B is 2x.

Then, the area of square A can be written as , and the area of square B can be written as .

There's no diagram here with shaded region, so I'll just find the area of square A as a percentage of the area of square B:

= 1/4 = 25%

So, the answer is 25% (note this is the answer to the question: "express the area of square A as a percentage of the area of square B; there is no diagram showing me where the shaded area is, so I cannot answer the original question

4 0
2 years ago
Select the missing numbers. Remember to indicate a negative cash flow with parentheses.
cluponka [151]

To find the cash flow, subtract the Cash Disbursements from the sales receipts for each month.


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April: 130 - 95 = $35

May: 145 - 100 = $45

June: 165 - 105 = $60

4 0
3 years ago
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