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3 years ago

Solve by substitution -X-4y=8 x+4y=-1

Mathematics

1 answer:

Rufina [12.5K]3 years ago

3 0

Answer:

Your answer is: No solution

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Step-by-step explanation:

Hope this helped : )

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A one-year-old car is now worth AED 12 000.

masha68 [24]

Answer:

AED 15,000

Step-by-step explanation:

Depreciation is a reduction in the value or worth of an asset as a result of use.

Given that the car is depreciated by 20%, it means that the value of the car after the application of depreciation is the result of the original price of the car less the amount of depreciation which has been given as 20% of the original price.

Let the original price of the car (its price when it was new) be T then

T - 0.2T = 12,000

0.8T = 12,000

T = 12,000/0.8

= AED 15,000

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4 years ago

To build a computer, Tom needs to buy a motherboard for £ 120, and a CPU for

maksim [4K]

Answer:

£2200

Step-by-step explanation:

1 computer = £120 + £100

1 computer = £220

10 computers = £220 x 10

10 computers = £2200

7 0

3 years ago

Which expression has the same value as -1/7 divided by (-2/3)

Bess [88]

Answer:

214/1000

Step-by-step explanation:

-1/7 ÷ -2/3

-1/7 X 3/2

0.214

This is also the same as

214/1000

3 0

3 years ago

Read 2 more answers

In the table below, x represents the miles traveled and y represents the cost to travel by train.

olga2289 [7]

Answer:

yes

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

-25^-1/2 with explanation please

slavikrds [6]

Answer:

The simplified value of $-25^{-\frac{1}{2}}$ is $-\frac{1}{5}$ .

Step-by-step explanation:

As the given expression is

$-25^{-\frac{1}{2}}$

Lets simplify this expression step by step

$-25^{-\frac{1}{2}}....[A]$

$\mathrm{Apply\:exponent\:rule}:\quad \:a^{-b}=\frac{1}{a^b}$

$25^{-\frac{1}{2}}=\frac{1}{25^{\frac{1}{2}}}$

So, lets plug $25^{-\frac{1}{2}}=\frac{1}{25^{\frac{1}{2}}}$ in equation [A] i.e. $-25^{-\frac{1}{2}}....[A]$

$-25^{-\frac{1}{2}}....[A]$

$=-\frac{1}{25^{\frac{1}{2}}}$ ∵ $25^{-\frac{1}{2}}=\frac{1}{25^{\frac{1}{2}}}$

$=-\frac{1}{5}$ ∵ $25^{\frac{1}{2}}=5$

Therefore, the simplified value of $-25^{-\frac{1}{2}}$ is $-\frac{1}{5}$ .

Keywords: simplification, exponent rule

Learn more about expression simplification from brainly.com/question/13848834

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5 0

3 years ago