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Ber [7]
3 years ago
14

Solve the equation for x: 126 = 3x. A. x = 378 B. x = 129 C. x = 123 D. x = 42

Mathematics
1 answer:
KIM [24]3 years ago
4 0

Answer:

The answer is answer D, x=42.

Step-by-step explanation:

To isolate the variable, you need to divide both sides of the equation by three, using the division property of equality. 126/3=42 , and 3x/3=x , this gives you 42=x, or x=42, meaning the answer is D.

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Mrs. Jensen, the science teacher, collected 30 sedimentary rocks and 42 metamorphic
Burka [1]

Answer:

The most kits she can create is 6 with 5 sedimentary and 7 metamorphic

Step-by-step explanation:

Hope this helped, have a blessed day

3 0
3 years ago
If you draw all of the diagonals from a single vertex of a convex polygon with 8 sides, how many triangles are formed?
oee [108]
The number of triangles is n-2
n= number of sides
8-2= 6 triangles
if applying this you won't have to draw any diagonals to
find the number of triangles  just subtract 2 from the number of sides

hope this helps
6 0
3 years ago
Please please help me​
umka21 [38]

Answer:

If its 3 units down it will be (2,-1)(5,-3)(-3,-1) if its 3 units up its (3,4)(5,3)(-1,1)

Step-by-step explanation:

6 0
3 years ago
Editors preparing a report on the economy are trying to estimate the percentage of businesses that plan to hire
goldfiish [28.3K]

The number of randomly selected employers that would have to be contacted is 9604

<h3>How to solve for the value of n</h3>

The confidence level is 95%

1 - 0.95 = 0.05

We have to get the z value at 0.05

0.05/2 = 0.025

Using the standard normal table, the critical value at 0.025 = 1.96

We have to define the probability as P = 50% = 0.5

we have to define q = 1 - 50% = 0.5

The formula that would be used to find the value of n is given as

n = pq\frac{Zc}{E} ^2

These variables used are:

pq = variance of population

E = margin of error = 0.01

critical value = Zc = 1.96

n = 0.5*0.5 (\frac{1.96}{0.01})^2

= 0.25 * 38416

= 9604

Hence the sample space is given as 9604

Read more on confidence interval here:

brainly.com/question/26658887

#SPJ1

8 0
1 year ago
Write the slope intercept form of the equation for the line that is described in the following function table.
Elenna [48]

Answer:

y=mx+b

m = slope

b = y-intercept

To find slope we use the equation, change in y divided by the change in x. Let's use points (2, 2) and (3, 1).

(2-1) / (2-3) = -1

Meaning our slope is -1 and it will be going down.

Next, we have to find the y-intercept which is the value of y when x=0. When x is 0 y will be 4.

y=-1x+4

7 0
3 years ago
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