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n200080 [17]
3 years ago
14

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:

15

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!

Hope this helped! Please mark as brainliest! Thanks

5 0
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.

6 0
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

6 0
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}

6 0
3 years ago
Read 2 more answers
Can you help me please.​
Makovka662 [10]

Step-by-step explanation:

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

3 0
3 years ago
Read 2 more answers
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