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3 years ago

Answer this question correctly please and then I’ll mark you as a brainliest!

Mathematics

1 answer:

Studentka2010 [4]3 years ago

8 0

Answer:

Step-by-step explanation:

1) 2 - (- 8) = 2 + 8 = 10

2) 2/5 + (- 1/5) = 2/5 - 1/5 = 1/5

3) We can find the common denominators through the least common multiple between the denominators:

4,12 | 2

2, 6 | 2

1, 3 | 3

1, 1 (2 × 2 × 3 = 12)

Then, 12 is the least common denominator.

4) 8 (1/4) + 10 (2/5) + 7 (5/8)

8 (1/4) = 4/4 + 4/4 + 4/4 + 4/4 + 4/4 + 4/4 + 4/4 + 4/4 + 1/4 = 33/4

10 (2/5) = 5/5 + 5/5 + 5/5 + 5/5 + 5/5 + 5/5 + 5/5 + 5/5 + 5/5 + 5/5 + 2/5 = 52/5

7 (5/8) = 8/8 + 8/8 + 8/8 + 8/8 + 8/8

+ 8/8 + 8/8 + 5/8 = 61/8

33/4 + 52/5 + 61/8

Employing the least common denominator:

4, 5, 8 | 2

2, 5, 4 | 2

1, 5, 2 | 2

1, 5, 1 | 5

1, 1, 1 (2 × 2 × 2 × 5 = 40)

(40 ÷ 4 × 33)/40 + (40 ÷ 5 × 52)/40 + (40 ÷ 8 × 61)/40

330/40 + 416/40 + 305/40

1051/40

This person ran about 26 Miles

I hope I helped you.

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A 3.0 kg book sits on a very high shelf 4.5 meters above the ground. Calculate the potential energy of the book.

poizon [28]

MASS*GRAV*HEIGHT=PE
MASS=3
GRAV=9.8
HEIGHT=4.5
3*9.8*4.5=132.3
POTENTIAL ENERGY= 132.3

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3 years ago

Monthly budget for her cell phone bill when she spent 120% of her budget and the bill was 60.00 what’s her monthly budget

IRISSAK [1]

Solution: $50

Step by step: you can set up the equation that 120%x=60, but for it to be easier you can just change 120% to 1.2 (one whole and 2 tenths or 120) to get the equation 1.2x=60, then to find x just do the algebra
1.2x=60
x=60/1.2
x=50

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3 years ago

When x = 2e, <img src="https://tex.z-dn.net/?f=%5Clim_%7Bh%20%5Cto%200%7D%20%5Cfrac%7Bln%28x%20%2B%20h%29%20-%20ln%28x%29%7D%7Bh

dybincka [34]

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4 years ago

Read 2 more answers

Match each complex number with its equivalent expression i^157 i^315 i^102 i^76

ryzh [129]

Answers:

$i^{157} = i\\\\i^{315} = -i\\\\i^{102} = -1\\\\i^{76} = 1\\\\$

=====================================================

Explanation:

By definition, $i = \sqrt{-1}$

Squaring both sides gets us $i^2 = -1$

Then multiply both sides by i to get $i^3 = -i$

Repeat the last step and you should get $i^4 = -i^2 = -(-1) = 1$

---------------

Notice we have this pattern going on:

$i^0 = 1\\\\i^1 = i\\\\i^2 = -1\\\\i^3 = -i\\\\i^4 = 1\\\\$

Once we reach i^4, we start the process over again.

It repeats every 4 terms.

This means we'll divide the exponent over 4 and look at the remainder. We ignore the quotient completely.

157/4 = 39 remainder 1

That remainder 1 is the exponent of the simplified term

$i^{157} = i^1 = i$

---------------

Similarly,

315/4 = 78 remainder 3

So $i^{315} = i^3 = -i$

---------------

102/4 = 25 remainder 2

$i^{102} = i^2 = -1$

----------------

76/4 = 19 remainder 0

$i^{76} = i^0 = 1$

8 0

2 years ago

Perform the indicated operation. -27 ÷ -9 -3 -18 -36 none of the above

Vlad [161]

None of the above. The correct answer would be 3.

3 0

3 years ago