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stiv31 [10]
2 years ago
12

In solving 2x -5 = 3 do you have to use the addition property of equality first ? Why or why not ? Why do you nomrally use the a

ddition or equality first ?
Mathematics
1 answer:
nikdorinn [45]2 years ago
7 0

In that equation, you have to add the 5 over to the 3. You do this because you want the variable (x) by itself, meaning on one side. That’s why after you add the 5, you will have to divide by 2 to get x by itself. Hope this helps.

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Select the correct row in the table.
Dafna11 [192]

Answer:

(-4, 0)

Step-by-step explanation:

The x-intercept is when y = 0

Since y = 0 at x = -4, that is the row which reveals the x - intercept of the function.

4 0
2 years ago
A circle centered at the origin contains the point (0,-9). Does (8, sqr 17) also lie on the circle?
Reptile [31]

Check the picture below.

since the circle is centered at the (0,0) origin, and a point on it is at (0, -9), its radius is simple the distance between those two, or r = 9.

if the second point is also on the circle, it must also be 9 units away from the origin.

\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ (\stackrel{x_1}{0}~,~\stackrel{y_1}{0})\qquad (\stackrel{x_2}{8}~,~\stackrel{y_2}{\sqrt{17}})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ d=\sqrt{(8-0)^2+(\sqrt{17}-0)^2}\implies d=\sqrt{8^2+(\sqrt{17})^2} \\\\\\ d=\sqrt{64+17}\implies d=\sqrt{81}\implies d=9~~\textit{\Large \checkmark}

7 0
3 years ago
Please tell me how to do these questions, I'm confused.
Ahat [919]

Answer:

2. The office and the music room

6. 68 in. I think?

Step-by-step explanation:

7 0
2 years ago
I predict it will take 23 minutes to drive to my grandma's house today. It actually takes 24 minutes. What is the percent error?
snow_lady [41]

Answer:

4.167%

Step-by-step explanation:

Given: It was predicted that it will take 23 minutes to drive to grandma's house but it actually takes 24 minutes.

To find: percent error

Solution:

Predicted time = 23 minutes

Actual time = 24 minutes

Error is the difference between Approximate and Exact Value. Percentage Error is used to compare an estimate value to an exact value.

Error = 24 - 23 = 1 minute

Percent error = (error/actual time) × 100

= 4.167%

4 0
2 years ago
Why might researchers want to estimate the number of animals in a population?
Yuliya22 [10]

Answer:

If a researcher select less number of animals it may lead to missing of any significant difference even if it exist in population and if more number of animals selected then it may lead to unnecessary wastage of resources and may lead to ethical issues.

Step-by-step explanation:

6 0
1 year ago
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