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3 years ago

Help ?!-10+3x=8 X=??

2 answers:

8 0

Ok, so first off you need to remember that your goal is to get x alone.
How do you do this? Well, let's get rid of that pesky negative ten, shall we?
The opposite of a negative is positive, so you can move negative ten to the other side of the problem by adding ten. Make sure that you do operations on both sides. Once you add, you have 3x=18. When a number is right next door to an x, it means it is being multiplied. To get rid of the three, divide by three on both sides. Now your get x=6, which is your answer. Hopefully, I explained this well! :D

AlexFokin [52]3 years ago

4 0

X-10+3x=8 what you do to one side you do to the other.
-3 -3 to undo the addition you subtract, so you subtract 3 from one
5 side of the equation and the other so 8-3=5 then the 3 that you
x-10=5 subtracted it cancels so you drop down what is left which would
+10 +10 be x-10=5 so you add 10 on both sides to undo the subtraction
x=15 the the 10 you subtracted it cancels so 10+5=15 so x=15.
i tried to explain as well as i could so yea hope you understand.

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A parallelogram-shaped sponge is 1 inch by 3 inches. The area of a design is 66 square inches. How many times do you use the spo

Kipish [7]

Answer:

You can use the sponge 22 times to create the design

Step-by-step explanation:

Area of the parallelogram-shaped sponge = base × height = 3 inches × 1 inch = 3 square inches

Area of design = 66 square inches

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The sponge can be used 22 times to create the design

3 0

3 years ago

Read 2 more answers

Please help! see attached

nikdorinn [45]

Answer:

The lowest value of the confidence interval is 0.5262 or 52.62%
The highest value of the confidence interval is 0.5538 or 55.38%

Step-by-step explanation:

Here you estimate the proportion of people in the population that said did not have children under 18 living at home.It can also be given as a percentage.

The general expression to apply here is;

$C.I=p+-z*\sqrt{\frac{p(1-p)}{n} }$

where ;

p=sample proportion

n=sample size

z*=value of z* from the standard normal distribution for 95% confidence level

Given;

n=5000

Find p

From the question 54% of people chosen said they did not have children under 18 living at home

$\frac{54}{100} *5000 = 2700\\\\p=\frac{2700}{5000} =0.54$

To calculate the 95% confidence interval, follow the steps below;

Find the value of z* from the z*-value table

The value of z* from the table is 1.96

calculate the sample proportion p

The value of p=0.54 as calculated above

Find p(1-p)

$0.54(1-0.54)=0.2484$

Find p(1-p)/n

Divide the value of p(1-p) with the sample size, n

$\frac{0.2448}{5000} =0.00004968$

Find the square-root of p(1-p)/n

$=\sqrt{0.00004968} =0.007048$

Find the margin of error

Here multiply the square-root of p(1-p)/n by the z*

$=0.007048*1.96=0.0138$

The 95% confidence interval for the lower end value is p-margin of error

$=0.54-0.0138=0.5262$

The 95% confidence interval for the upper end value is p+margin of error

$0.54+0.0138=0.5538$

7 0

3 years ago

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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yan [13]

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