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drek231 [11]
3 years ago
7

Solve the following equation: x2-5=7

Mathematics
1 answer:
Yuliya22 [10]3 years ago
5 0

Answer:

x= 6

Step-by-step explanation:

Step 1: Write equation

2x - 5 = 7

Step 2: Solve for <em>x</em>

<u>Add 5 to both sides:</u> 2x = 12

<u>Divide both sides by 2:</u> x= 6

<u />

Step 3: Check

<em>Plug in x to verify if it's a solution.</em>

2(6) - 5 = 7

12 - 5 = 7

7 = 7

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given the equation y = 2x - 8, find the ordered-pair solution when x = 4 and the ordered-pair solution when y = 4
babunello [35]

Answer:

When x = 4, (4, 0)

When y = 4, (6, 4)

Step-by-step explanation:

To find the ordered-pair solution when x = 4, plug 4 into the x of the equation.

y = 2x - 8

y = 2(4) - 8

y = 8 - 8

y = 0

This produces the ordered pair (4, 0).

To find the ordered-pair solution when y = 4, plug 4 into the y of the equation.

y = 2x - 8

4 = 2x - 8

12 = 2x

6 = x

x = 6

This produces the ordered pair (6, 4).

6 0
3 years ago
12x15y=4140; x+y= ? <br> solve.
Semenov [28]

Answer: The number of $12 tickets and $15 sold are 120 and 180 respectively.

Step-by-step explanation:

The given equation is:

12x + 15y = 4140             .....(1)

Where,

x stands for $12 tickets and y stands for $15 tickets

According to the question:

x + y = 300           ....(2)

Now solving equation 1 and 2.

From equation 2:

x = 300 - y

Now putting this expression in equation 1.

12x + 15y = 4140

12(300 - y) + 15y = 4140

3600 - 12y + 15y = 4140

3600 + 3y = 4140

3y = 4140 - 3600

3y = 540

y = 180

And,

x = 300 - y = 300 - 180 = 120

The number of $12 tickets sold = x = 120

The number of $15 tickets sold = y = 180

Thus, the number of $12 tickets and $15 sold are 120 and 180 respectively.

4 0
2 years ago
What is the slope of the line y= 1/2x + 1?
myrzilka [38]
The slope is 1/2! Right in the problem!

I hope this helped! Mark me Brainliest! :) -Raven❤️
6 0
3 years ago
Read 2 more answers
Ian drinks 3 \text { pints}3 pints3, start text, space, p, i, n, t, s, end text of water during a long hike. He drinks 1\dfrac12
r-ruslan [8.4K]

Answer:

Total = 7\frac{1}{2} cups

Step-by-step explanation:

Given

Initially, he drank 3 pints of water

Then, 1\frac{1}{2} more cups

Required

How many cups did Ian drink altogether

This question can be solved by adding the size of water he drank during the hike and when he got home

i.e.

Total = 3\ pints + 1\frac{1}{2} cups

But the answer should be in cups;

So, number of pints has to be converted to number cups

Given that 1 pint = 2 cups;

3 pints will be 3 * 2 cups

3 pints = 6 cups;

So,

Total = 3\ pints + 1\frac{1}{2} cups

Total = 6\ cups + 1\frac{1}{2} cups

Total = 7\frac{1}{2} cups

Altogether, he drank 7\frac{1}{2} cups of water

5 0
3 years ago
Which of the following possibilities will form a triangle?
ivann1987 [24]

Answer:

Option 4

Step-by-step explanation:

The smaller sides must add up to be greater than the largest side so:

1) 6 + 8 < 15

1) No

2) 6 + 9 = 15

2) No

3) 9 + 6 < 16

3) No

4) 9 + 8 > 16

4) Yes

6 0
2 years ago
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