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IRINA_888 [86]
3 years ago
12

Why does: 5x+3x+2x = 10x and not 10xxx?

Mathematics
2 answers:
Helen [10]3 years ago
8 0
Because you are not adding the x's .When you add the coefficients, the variable comes along with it.
atroni [7]3 years ago
7 0
Because you are adding an amount of the same variable. They are like terms so you would combine them. If it was 10xxx it would be 10+3x. But, 5x+3x+2x is 10 because 3x+2x is 5 and 5x+5x is 10x. You do not add the actual x's together, just the amount that is shown.
Think of it as this way:
5x = x x x x x
3x = x x x
2x = x x
in total, there are 10 x's
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Please help!! I really need it thank you so much again!!
likoan [24]
Here you go..............

5 0
4 years ago
Can someone please help me with question 9
nataly862011 [7]

There are 24 oranges and 36 apples.

Each basket has to have the same number of fruit

So lets say that each basket will have exactly one orange and apple.

To get the maximum number of baskets, we have to use either all of the apples or all of the oranges.

You can't have 36 baskets, because you only have 24 oranges, even though there are enough apples.

But you can 24 baskets, because there are enough apples and oranges.

So you can use all of the oranges to make 24 baskets  (and you'll be left with 12 apples)

Answer: F. 24.

4 0
3 years ago
I need help on this
Tasya [4]

Answer:

TOTAL TAX IS: $19.25

TOTAL PRICE IS: $294.25

MONEY LEFT IS: $135.75

Step-by-step explanation:

First, you do a proportion:

?/275 = 7/100

the ?/275 represents how much money in $275

the 7/100 represents 7% (7 hundredths)

then you cross multiply:

275 x 7 = 1925

then you divide:

1925 divided by 100 = 19.25

<em><u>So $19.25 is the tax amount.</u></em>

<em><u></u></em>

To get the total price, you add:

Tax ($19.25) + Cost($275) = $294.25

<u><em>$294.25 is the total amount that Anna has to pay.</em></u>

<u><em></em></u>

To get what Anna has left over, you subtract:

Has($430) - Spend($294.25) = $135.75

<u><em>Anna has $135.75 left.</em></u>

<u><em></em></u>

I hope this helped you a lot!

Bri <3

3 0
3 years ago
I need help pls help me in geometry homework
djverab [1.8K]
You can use photo math but the first one is b
3 0
3 years ago
The concentration of carbon monoxide (CO) in a gas sample is measured by a spectrophotometer and found to be 85 ppm. Through lon
alukav5142 [94]

Answer:

The confidence interval is (85 - \frac{14.81}{\sqrt{n}},85 + \frac{14.81}{\sqrt{n}}), in which n is the size of the sample.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.645\frac{9}{\sqrt{n}} = \frac{14.81}{\sqrt{n}}

The lower end of the interval is the sample mean subtracted by M. So it is 85 - \frac{14.81}{\sqrt{n}}

The upper end of the interval is the sample mean added to M. So it is 85 + \frac{14.81}{\sqrt{n}}

The confidence interval is (85 - \frac{14.81}{\sqrt{n}},85 + \frac{14.81}{\sqrt{n}}), in which n is the size of the sample.

4 0
3 years ago
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