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NARA [144]
3 years ago
9

Which expression is equivalent to \sqrt(-80)?

Mathematics
2 answers:
DedPeter [7]3 years ago
8 0
√-80 can be factored out, to see which factors can be square rooted. A pair of factors would be 16 and -5, so that would be 4√-5. But, negative numbers cannot be inside a square root. So, √-1 is the same thing as <em>i</em>, or <u>imaginary number</u>. So, the expression equivalent to √-80 is 4<em>i</em>√5.
Have a nice day! ♪
zysi [14]3 years ago
4 0

C on 3dgenuity just took quiz.

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George wants to buy a new bike, which costs $280. So far, he has earned $56. What percent of the total price has he already earn
Katarina [22]

Answer:

20%

Step-by-step explanation:

56÷280=0.2

0.2×100=20

<em>Formula: ÷ numerator by denominator. Then multiply what you got by 100.</em>

<em>Can I please have Brainliest?</em>

4 0
3 years ago
A store has jeans on sale for 30% off. If the jeans
pishuonlain [190]

Answer:

<h2>$30.24!</h2>

Step-by-step explanation:

Find the discounted price by setting up an equation

40-.3(40) AKA 30% of the original price is being taken off of the original price

Evaluate

40-12

$28 = discounted price

Sales tax is based on the reduced/discounted price* remember this

OF= multiplication (in this scenario)

.08x28

$2.24= sales tax

Add tax with discounted price

28+2.24=

<h2>$30.24!</h2>
4 0
3 years ago
Magnus purchased a new car for $35,865. It depreciates about 3.6% each year. What is the value of the car after 10 years?
Naddik [55]
1 year = 3.6 % depreciation
100-3.6=96.4

so you do 35,865 ×0.964 = 34,573.86

so the price after a year is £34,573.86

to find out what the price is after 10 years you do 34,573.86 (0.964) to the power of 10
which equals £23961.73

I hope that was helpful :)

5 0
4 years ago
If angle B measures 120 degrees, find
SpyIntel [72]

Answer:

C. 120°

Step-by-step explanation:

There are two paralell lines, one is part of Angle B, and the other of Angle Q. Then there is a diagonal line, coming at the same angle from B all the way to Q, because the other two lines are paralell. It basically means if you were to slide the flat line which is connected to Q up the diagonal line, it would fit perfectly with it's parallel. So the two angles; Angle B and Angle Q; are the exact same.

Hope this helped! Good luck with future math problems :)

7 0
4 years ago
Read 2 more answers
3) Solve the problem using your graphing calculator. Round all para meter values to the nearest hundredth.
Mama L [17]

Answer:

mmm, well, not much we can do per se, you'd need to use a calculator.

I'd like to point out you'd need a calculator that has regression features, namely something like a TI83 or TI83+ or higher.

That said, you can find online calculators with "quadratic regression" features, which is what this, all you do is enter the value pairs in it, to get the equation.

Step-by-step explanation:

8 0
3 years ago
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