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3 years ago

Work out m and c for the line: y=4 - X

Mathematics

1 answer:

Sophie [7]3 years ago

3 0

Answer: im a adult

Step-by-step explanation:

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Solve for w (4w-5)(7-w)=0

nataly862011 [7]

Ask: When will (4w-5)(7-w) equal zero?

When 4w-5=0 or 7-w=0

Solve each of the 2 equations above

w = 5/4 , 7

7 0

3 years ago

You buy a calculator for $65. A 6% sales tax is added.

Vika [28.1K]

T=65$+(65$*.06)
T=65$+3.9$
T=68.9$

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3 years ago

What is 84 seconds to 8 seconds

Inessa05 [86]

Answer:

8 out of 84: 90% decrease

200 out of 238: 16% decrease

Step-by-step explanation:

To find a percent decrease, you first subtract the end number by the initial number. This gives you the change.

ex. 84-8=76

Now you divide the change by the initial number. You'll get a decimal.

ex. 76/84=0.904...

Multiply the decimal times 100, or move the decimal to the right twice.

ex. 0.904... -> 90.4...

Now round to the nearest ones place

ex. 90.4 -> 90%

5 0

3 years ago

A shirt was marked down 25% which means you saved $15. What was the original cost of the shirt? What is the new price?

wlad13 [49]

60 dollars. You multiply 15 four times because 25% of the cost is 15 so you multiply it by 4 to get the total answers.

6 0

3 years ago

The population of a city has decreased by 38% since it was last measured. If the current population is 27,900, what what the pre

Varvara68 [4.7K]

<u>Answer: </u>

The population of a city has decreased by 38% since it was last measured. If the current population is 27,900 .Previous population of city was 45000.

<u> Solution: </u>

Given that current population of city is 27900.

Also, population of a city has decreased by 38% since it was last measured.

Let assume that population of city when it was last measured = x

Decreased of 38% means x-38% of x . we can write this as,

$=x-\frac{38}{100} \times x$

$=\frac{100 x-38 x}{100}$

$=\frac{62 x}{100}=\frac{31 x}{50}$

So current population is $\frac{31 x}{50}$

Equating above expression to the given value of current population, we get

$\frac{31 x}{50}=27900$

$x=\frac{27900 \times 50}{31}$

x=45000

Hence previous population of city was 45000.

7 0

3 years ago