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olganol [36]
3 years ago
7

When simplified, 9x − (x + 1) is:

Mathematics
2 answers:
Naddika [18.5K]3 years ago
5 0

Answer:

the answer is C

Step-by-step explanation:

when theres a - before brackets it's like a one so you just simply do -1×x and -1×1 and thats the answer

Ronch [10]3 years ago
4 0

Answer:

C. 8x-1

Step-by-step explanation:

1. Distribute

9x-(x+1)

9x-x-1

2. Combine like terms

9x-x-1

8x-1

Therefore your answer is C. 8x-1

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torisob [31]

Answer:

first one with -1...21

Step-by-step explanation:

only one that follows quadratic formula format

5 0
3 years ago
3(2x + 6) = 2(4x – 5)
maxonik [38]

Answer:

x = 14

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6 0
3 years ago
The half-life of cobalt-60 (used in
Likurg_2 [28]

Answer:

6.25 gm left

Step-by-step explanation:

Find the number of half lives in 26.3 years

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5 0
2 years ago
8x+5y=35 solve for y no work needed but you can show me the work if you want i will still look at it thank you in advance
solong [7]

Answer:

y=7-(8/5)x

Step-by-step explanation:

To solve for y we need to get Y on one side of the equation all by itself.  To start we can move the 8x to the side with the 35 by subtracting 8x on both sides which gets us to 5y=35-8x then we just need to get the 5 detached from the y and we will have solved for Y.  To do this we can divide by 5 on both sides to cancel out the 5 with the Y which leaves us with y=7-(8/5)x

I hope this helps and please don't hesitate to ask if there is anything still unclear!

4 0
3 years ago
Read 2 more answers
Devon has 14 steel balls of equal weight. If he puts 8 of them in one pan of a balance, and the rest along with a weight of 20 g
astra-53 [7]
Let n be a number of balls: n = 14

In one pan you have 8 balls: 8n
In the other pan you have the rest of balls (14 - 8 = 6) along with a <span>weight of 20 grams = 6n + 20
So the pans are balanced:
8n = 6n + 20

Now, just solve the equation:
8n - 6n = 20
2n = 20
n = 20/2
n = 10
So, you know that a ball weights 10 grams.</span>
4 0
3 years ago
Read 2 more answers
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