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3 years ago

3. If 4 is subtracted from twice a number the result is 10 less than the number

Mathematics

1 answer:

S_A_V [24]3 years ago

7 0

2x - 4 = 10

Add 4 to both sides.

2x = 14

Divide both sides by 2.

x = 7

3(x/2) = x/4

Distributive property.

3x/2 = x/4

Convert denominators to a common number.

6x/4 = x/4

Multiply both sides by 4.

6x = x

Subtract x from both sides.

5x = 0

Divide both sides by 5.

x = 0

This equation is equal to 0.

3(n + 2) = n - 5

Distributive property.

3n + 6 = n - 5

Subtract n from both sides.

2n + 6 = -5

Subtract 6 from both sides.

2n = -11

Divide both sides by 2.

n = -5.5

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Plz solve this 2 question help

makkiz [27]

Answer:

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3 years ago

Alexis washes 10 1/2 windows in 3/4 hours. At this rate, how many windows can she wash in one hour?

Zepler [3.9K]

Alexis can wash a total of 14 windows in 1 hour

<h3>Solution:</h3>

Given that Alexis washes $10\frac{1}{2}$ windows in $\frac{3}{4}$ hours

To find: number of windows washed in one hour

To simplify the calculations we will convert the given mixed fraction to improper fraction

$\begin{array}{l}{=10 \frac{1}{2}} \\\\ {=\frac{2 \times 10+1}{2}} \\\\ {=\frac{21}{2}=10.5}\end{array}$

Hence, to wash 10.5 windows, Alexis takes 0.75 hours

Let "n" be the number of windows washed in 1 hour

10.5 windows ⇒ 0.75 hours

"n" windows ⇒ 1 hour

By cross-multiplication we get,

$n \times 0.75 = 10.5 \times 1$

$n = \frac{10.5}{0.75} \\\\n = 14$

Thus Alexis can wash 14 windows in one hour

4 0

3 years ago

Si una persona aprovecha un descuento del 20% y paga 60.000 pesos por una camisa,¿Cuál era el precio de la camisa sin el descuen

oksano4ka [1.4K]

Answer:

the price of the shirt without discount is 75,000 pesos

Step-by-step explanation:

The computation of the price of the shirt without discount as follows:

There is a discount of 20%

And the person pays 60,000 pesos after considering the discount

So, the price without discount is

= 60,000 pesos ÷ 0.80

= 75,000 pesos

hence, the price of the shirt without discount is 75,000 pesos

6 0

3 years ago

Can you guys help me please!!

ella [17]

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1.C

2.C

3.D

4.D

5.D

6.A

7.C

8.B

9.A

10.C

11.A

12.B

13.D

14.C

7 0

3 years ago

What is 15% of 60 show your work to prove your answer

Mila [183]

To convert a percentage to a decimal you move the decimal two places to the left. Therefore:

15.% becomes .15

You then multiply this decimal to the number you are trying to find the percentage of.

.15 × 60 = 9.

9 is 15% of 60.

3 0

3 years ago

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