Is 2j+8k - 4k and 8 (1j+ik) equivalent

Mathematics

1 answer:

enyata [817]3 years ago

4 0

9514 1404 393

Answer:

Step-by-step explanation:

The first expression simplifies to 2j+4k.

The second expression expands to 8j+8k.

These are not the same expression, so the values are not equivalent.

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What can you conclude about 3/5 and 60/100 if you know 3/5 is equivalent to 6/10 and 6/10 is equivalent to 60/100

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First we check whether $\frac{3}{5}$ is equivalent to $\frac{6}{10}$

$\frac{3*2}{5*2}$ = $\frac{6}{10}$

Both top and bottom are multiplied by 2 to get $\frac{6}{10}$

So they are equivalent fractions.

Now we check whether $\frac{6}{10}$ is equivalent to $\frac{60}{100}$

$\frac{6*10}{10*10}$ = $\frac{60}{100}$

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A circle has its center at the center of a square with 26-inch sides. Using 3.14 for pi, find the area of the square not covered

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For squrae
area=side²
perimiter=4(side)

for circle
area=pir²
circumference=2pir

side=diameter, diameter/2=radius=side/2

find area not covered
that is areasquare-areacircle
areasquare=26²=676 sqauare inches
areaciecle, diameter=side, 26/2=13, area=pi13²=169*3.14=530.66 square inches

areanotcovered=676-530.66=145.34 square inches not coverd

ratio of perimiter to circumferece
perimiter=4*26=104
circumference=2pir=2pi13=26pi=26*3.14=81.64
circumference to perimiter is 81.64/104=0.785

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Answer:

Step-by-step explanation: