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Tema [17]
3 years ago
11

PLEASE HELP!!!!!!!!! Explain and demonstrate how to change 4/20 into a percent.

Mathematics
1 answer:
Fynjy0 [20]3 years ago
3 0
4/20 x 5 = 20/100 = 20%
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Sean bought a laptop and a printer.
stealth61 [152]

Answer:

£102.04

Step-by-step explanation:

£1250 - £1100 = £150

printer sold for £150

£150 = 147%

1% = 1.0204

100% = 102.0408

to 2dp = £102.04

3 0
2 years ago
Sally has a discount card that reduces the price of her grocery bill in a certain grocery store by 5%. if c represents the cost
MissTica
Y = sallys grocerys
x = how much sally paid

y - (.05) = x
3 0
3 years ago
Which shows the correct substitution of the values a, b, and c from the equation 1 = -2x + 3x2 + 1 into the quadratic
lidiya [134]

Answer: A

Step-by-step explanation:

The first thing we need to do is to make sure our equation is in standard form. The given equation is not in standard form.

3x²-2x=0

Now that the equation is in standard form, we can find our A, B, C to see which quadratic equation is correct.

A=3

B=-2

C=0

We can automatically eliminate D because the first value is -3 when it is supposed to be -(-2). Also, the denominator is supposed to be 2a. We know that A=3. The denominator should be 2(3), not 2(-2).

Next, we can eliminate B and C. For the 4ac, we know it has to be 4(3)(0) because A=3 and C=0. B and C have given 4(3)(2) and 4(3)(1), respectively. This does not match A=3 and C=0.

Therefore, A is the correct answer.

4 0
3 years ago
"if the standard deviation of a group of 20 scores is 15, what is the variance?"
DerKrebs [107]

We have been given that the standard deviation of a group of 20 scores is 15 and we are asked to find variance.

Since we know variance is square of standard deviation. In order to find out the variance of the given data we have to take the square of 15.

\text{ Variance}=\sigma^{2}\\
=15^{2}=225

Therefore, our variance is 225.


7 0
2 years ago
Solve the inequality.
mr Goodwill [35]

Answer:

which inequality? where the question ?

Step-by-step explanation:

4 0
3 years ago
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