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lord [1]
1 year ago
12

Expand and simplify bracket please quickly

Mathematics
1 answer:
natulia [17]1 year ago
4 0

Answer:

4y²-1/4 is the required answer

Step-by-step explanation:

(2y -  \frac{1 }{2} )(2y +  \frac{1}{2} ) \\ using \: formula \:  {x}^{2}  - y {}^{2}  = (x - y)(x + y) \\ 4y {}^{2}  -  \frac{1}{4}

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Stephan con run 3 miles in 15.75 minutes. Keisha con run 5 miles in 22.6 minutes. Who can run faster?​
Marina CMI [18]

Answer: Keisha can run faster than Stephan.

Step-by-step explanation:

Let's figure out how long it takes for them to run a mile.

\frac{15.75}{3} =5.25\\\frac{3}{3} = 1

It would take Stephan 5.25 minutes to run a mile

\frac{22.6}{5} =4.52\\\\\frac{5}{5} =1

It would take Keisha 4.52 minutes to run a mile

Since Keisha takes less time to run a mile she is faster.

3 0
3 years ago
Read 2 more answers
(2+5i)(6-i) simply ........
Verizon [17]

Answer:

17+28i

Step-by-step explanation:

TELL ME IF IM RIGHT PLEASR

3 0
2 years ago
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4x+32=24<br> show your work
sp2606 [1]

Answer:

x = -2

Step-by-step explanation:

Original equation:

4x + 32 = 24

Subtract 32 from 24

-8

The equation should look like this now:

4x = -8

Divide both sides by 4

x = -2

Hope this helps :)

4 0
2 years ago
Over the past seven days, Mrs. Cho found that the temperature outside had dropped a total of 35
s344n2d4d5 [400]

Answer:

Average change in temperature each day = 5 degrees/day

Step-by-step explanation:

\frac{35}{7} = 5

8 0
3 years ago
Zoey purchased a new car in 1992 for \$28,000$28,000. The value of the car has been depreciating exponentially at a constant rat
elena-s [515]
400$
Explanation:
In 1992, the price is 28000$ and 9600$ in 1996 so in 4 years the value the car lost is 18400$
Dividing 18400 by 4 years we get 4600 depreciation value per year.
Between 1996 and 1998 there is 2 years
So in 1998 the value of the car will be:
9600 (value in 1996) - 2x4600 = 400$
3 0
3 years ago
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