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anyanavicka [17]
3 years ago
14

Nine subtracted from twice a number

Mathematics
1 answer:
professor190 [17]3 years ago
7 0

Answer:

2x - 9 = -5

2x = 4

x = 2

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Somebody please explain this I have a major exam soon and I really need to know how to solve problems like this​
nevsk [136]

Answer:

y = 2x - 3

Step-by-step explanation:

Step 1: Find the slope. You find the slope by using the formula y2-y1/x2-x1. (2, 1) and (4, 5) are our points. Let's find our values.

y2= 5

y1= 1

x2 = 4

x1 = 2

Plug in the numbers into the equation. 5 - 1 is 4. 4 - 2 is 2. 4/2 is 2. There. Our slope is 2.

Step 2: Find the b value. Keep in mind that an equation in point-slope form is y = mx + b, where m = the slope, and b = the y-intercept. For this part, you will plug in one of the points as x and y to find the b value. let's use point (4, 5)

The equation then becomes 5 = 2(4) + b. As we know, 2 * 4 is 8. Subtract 8 on both sides of the equation to cancel out the right side and isolate the b variable. 5 - 8 is -3. Even if you use the other point for the equation (1 = 2(2) +b), you should get the same answer of -3.

5 0
3 years ago
If x is a positive integer, then x is _____ negative.
faltersainse [42]
A. never

because you are limiting x from 0 to infinite, and all of these are positive.
3 0
2 years ago
Colin found 22 more mushrooms that sophie did while they were out picking them in the forest. On the way home Sophie asked Colin
Rasek [7]

Answer:

11 mushrooms

Step-by-step explanation:

Let's take two sets of numbers that fulfill the requirements (2 and 24 | 5 and  27)

In the first case, there are 26 mushrooms, and to have an equal amount they each need 13. Collin had to give 11 mushrooms to Sophie.

In the second case, there are 32 mushrooms, and they both need 16 each. So in this case, Collin also had to give 11 to Sophie.

The answer is 11 mushrooms.

5 0
2 years ago
The cost of grapes was $0.88 a pound. Change bought 4.5 pounds. Find the amount he paid.
Schach [20]

Answer:

$3.96

Step-by-step explanation:

If he gave $.88 per each pound he bought all you have to do is multiply $.88 by how many pounds he bought 4.5. $.88x4.5 equals $3.96

3 0
3 years ago
Read 2 more answers
In a standard deck of cards, how many different sets of 4-of-a-kind are there?
attashe74 [19]
There are 13 different 4 of a kinds.
4 aces 4 twos 4 threes 4 fours 4 fives 4 sixes 4 sevens 4 eights 4 nines 4 tens
    1           2         3           4          5         6             7            8           9          10 
4 jacks 4 queens 4 kings
    11         12          13
The answer is 13 different sets.
I hope this helps :)

8 0
3 years ago
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