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nata0808 [166]
3 years ago
10

Evaluate each value expression for the given valueof x: 20-3x, x=5

Mathematics
2 answers:
natta225 [31]3 years ago
8 0

Answer:

5

All you do is put the equation in a calculator and then put 5 as x, then you will get the answer 5

xeze [42]3 years ago
7 0

Answer:

= 5

Step-by-step explanation:

20 - 3(5)

20 - 15

= 5

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Answer:

≈ 1833

Step-by-step explanation:

To find ratio of proton mass to electron mass, we have to divide.

The numbers are given in <em>scientific notation</em>.

Let a number be  a*10^b and another be  c*10^d, when we divide, we will follow the rule shown below:

\frac{a*10^b}{c*10^d}=(\frac{a}{c}*10^{b-d})

Now, we use the information given to find the ratio:

\frac{1.67*10^{-24}}{9.11*10^{-28}}\\=(\frac{1.67}{9.11}*10^{-24--28})\\=0.1833*10^4

This means we can find the number by taking 4 decimal places to the right, so that would becomes:

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The approximate ratio is 1833 [mass of proton is around 1833 times heavier than mass of electron]

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3 years ago
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lana66690 [7]
What type of math is this problem? Is it advanced?

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8x−5x+4−x=Ax+8. Anyone know
lora16 [44]

Answer:

a = \frac{2x-4}{x}

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Step-by-step explanation:

Let's solve for a.

8x−5x+4−x=ax+8

Step 1: Flip the equation.

ax+8=2x+4

Step 2: Add -8 to both sides.

ax+8+−8=2x+4+−8

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Step 3: Divide both sides by x.

Let's solve for x.

8x−5x+4−x=ax+8

Step 1: Add -ax to both sides.

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Step 2: Add -4 to both sides.

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Step 3: Factor out variable x.

x(−a+2)=4

Step 4: Divide both sides by -a+2.

Hope this helps!

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27 in3 because you have to divide it

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