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Anit [1.1K]
3 years ago
13

What method would you choose to solve the equation? 4x^2-48=0

Mathematics
1 answer:
melamori03 [73]3 years ago
6 0
I'd definitely factor 4x^2-48 first.  Factors are (4)(x^2-12).

This factors further:                                         (4)* (x-2sqrt(3) ) * (x+2sqrt(3) )
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Mark knows that he will need to buy a new car in 5 years. The car will cost $15,000 by then. How much should he invest now at 8%
exis [7]
X - initial investment
8% - annual rate

x·=15,000,

so x = 10094.54   

ANSWER: $10,094.57
3 0
3 years ago
Primula Brandybuck is sampling the family harvest of tomatoes. She randomly selects 446 tomatoes and inspects them for cracking.
Marta_Voda [28]

Answer:

Step-by-step explanation:

5 0
3 years ago
Paige and Natalie have the same ratio of green marbles in their bags of marbles. Paige has 4 green marbles and 16 total marbles.
laiz [17]
<h2><u>Answer:</u></h2>

Natalie has a total of <u>40 marbles.</u>

<u />

<h2><u>Step-by-step explanation:</u></h2>

If 4 of Paiges' marbles are green, then we would write this as the ratio

<u>4:16</u>, or <u>1:4</u>

This means that for every green marble she has, she has 4 total marbles

Therefore, if Natalie has 10 green marbles, we would multiply this by 4 to get a total of <u>40 marbles.</u>

6 0
2 years ago
A plane has an airspeed of 134 km divided by h. It is flying on a bearing of 78 degrees while there is a 21 km divided by h wind
ANEK [815]

Answer:

Ground speed = 131.25 km/h

Bearing = 92.68º

Step-by-step explanation:

If we imagine a triangle to depict the question with one side 134 km/h at an angle of 78º to the right of vertical (the plane's speed vector).

At the end, we have a line 21 km/h at an angle of 180 (from north), a vertical down from the end of the plane's vector. This vertex is angle B

This makes a triangle with the interior angle B of 78º.

The 3rd side is the ground speed which we can find using the Cosine rule:

b² = a² + c² - 2•a•c•cos(78)

b² = 134² + 21² - 2•134•21•cos(78)

b² = 17226.873

b = 131.25 km/h

The true course bearing" is the ground track. Thus;

Using the Sine rule to find angle A, we have;

(sin(A))/34= sin(78)/b

Thus,

sin(A) = (34 x sin(78))/131.25

sin(A) = 0.2534

A = sin^(-1)0.2534

A = 14.68º

Ground track = A + 78 = 14.68 + 78 = 92.68º

8 0
3 years ago
Richard bought 3 1/4 ft of plumbing pipe. The pipe cost $1.60 a foot. How much did Richard pay for plumbing pipe?
Vanyuwa [196]
2 1/8=2.125 and 3 3/8=3.375 then let x represent the amount of money that he payed for felt. Next 2.125+3.375=5.5 then
x=5.5*1.5
x=8.25

Enjoy!=)
6 0
3 years ago
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