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3 years ago

Please solve and explain how. Photo attached

Mathematics

1 answer:

geniusboy [140]3 years ago

7 0

Answer:

Step-by-step explanation:

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

multiply by $\frac{k^2-2k}{1}$ on each side

$2=k^2-2k-1$

add 1 on both sides $3=k^2-2k$

make it equal 0

$0=k^2-2k-3$

Factor

$(k-3)(k+1)$

answer is 3 and -1

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Three times the difference of 5 and a number gives 30. Find the number.

Temka [501]

Answer:

Step-by-step explanation:

we need to write the equation. I came up with....

3(5 - x) = 30

so take the 3 away from the 30. I think your not supose to do the 3 because it out of the ( ). the opppisite of multiplication is division. so...

3 divided by 30 =10

rewrite

(5 - x) = 10

take the 5 away. the oppisite of subbtraction is addition.

5 + 10 = 15

check your; plug in x

3(5 - 15) = 30 This equation looks true!

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3 years ago

A boy rides his bike at a speed of 28 miles per hour. How

sergejj [24]

Answer:

About 4 hours.

Step-by-step explanation:

Let's set up a proportion and cross multiply.

$\frac{28 miles}{1 hour} = \frac{120 miles}{x}$

Cross multiply.

120 = 28x

Divide by 28 on both sides.

= 4.28571428571

Round this to the nearest whole number, which is just 4. The answer is about 4 hours.

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2 years ago

Evaluate f ( - 5 ) =

Firdavs [7]

Answer: −5

Step-by-step explanation:

simplify: (−5)

Re-order terms so constants are on the left:

(−5)f(−5)−5

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2 years ago

(5/10)^4 in exponential form

Whitepunk [10]

Answer:

$6.25 \times {10}^{ - 2}$

Step-by-step explanation:

${ \bigg( \frac{5}{10} \bigg) }^{4} \\ \\ = {(0.5)}^{4} \\ \\ = 0.0625 \\ \\ = 6.25 \times {10}^{ - 2}$

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3 years ago

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Can you help me please.

Makovka662 [10]

Step-by-step explanation:

$(3a - 15) - (9a + 2) \\ - 6a - 17$

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3 years ago

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