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3 years ago

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Mathematics

1 answer:

vfiekz [6]3 years ago

7 0

You follow the rules for the quadratic formula, where

x= (-b +- √(b²-4ac) )/2a

Filling a, b and c in yields

x = (8 +- √(64-164) ) / 2 =>

x = (8 - √-100)/2 or x = (4 + √-100)/2

Well, √-100 = 10i, so then you simplify to the last answer, D:

x = 4-5i or x=4+5i

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please help solve this problem the - is a negative sign. (2b+-7)+5(b+-3)

enyata [817]

Answer:

Step-by-step explanation:

(2b+-7)+5(b+-3)

Multiply 5 throughout the second parentheses

(2b-7)+(5b-15)

Add 2b and 5b

7b-7-15

Subtract -7 and -15

7b-22

3 0

3 years ago

Darla has four buckets shaped like cylinders she is filling the buckets with water by using a scoop shaped like a cone if the co

padilas [110]

Answer:

12 Scoops

Step-by-step explanation:

Darla has 4 Cylinder Shaped Buckets

Volume of the Cylinders $=4*\pi r^2h$

The scoop is cone shaped and:

Volume of the Cone Scoop $=\frac{1}{3} \pi r^2h$

Since the radius and height of the cone scoop and cylindrical buckets are the same,

The number of Cone Scoops it will take to fill the buckets is:

Total Volume of Buckets/Volume of Cone Scoops

$=\dfrac{4*\pi r^2h}{\frac{1}{3} \pi r^2h} \\=4 \div \frac{1}{3}\\=12$

It will take 12 Scoops to fill the 4 buckets.

5 0

3 years ago

What is the value of (f – g)(144)?

NikAS [45]

(f - g) (144) Multiply 144 by both variables in the other set of parentheses.

[(144) (f) - (144) ( g)] Simplify

144 f - 144g

5 0

3 years ago

I need some help with this Math problem.

Sergeeva-Olga [200]

Answer:

Step-by-step explanation:

D. violates the Law of Sines.

5 0

2 years ago

Divide 800ml into ratio 3:7

Black_prince [1.1K]

Simply take the numerator (3) and denominator (7) and add them together.

3+7 = 10, which means that the ratio will provide parts that are in multiples of 10 depending on the total

so take 10x = 800

x = 80.

Then multiply this by the numerator and denominator

3*80/7*80 = 240/560.

7 0

3 years ago