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3 years ago

Pls help I’ll mark brainliest q

Mathematics

1 answer:

IceJOKER [234]3 years ago

5 0

Answer:

(5,30)

Step-by-step explanation:

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Discriminant and the number of real roots for this equation 9x2+12x+4=0

BaLLatris [955]

The discriminant is b^2-4ac
In this equation 9=a, 12=b, 4=c
Plugging into the formula
12^2-4(9)(4)=
144-324 =
-180 is the discriminant
Since the discriminant is a negative number there are no real roots

8 0

4 years ago

M is directly proportional to r^3

Oliga [24]

Answer:

Step-by-step explanation:

<u>Proportions </u>

We know M is directly proportional to $r^3$

This can be written as

$M=kr^3$

Where k is the constant of proportionality which will be determined knowing that when r = 4, M= 160. Substituting in the equation above:

$160=k\cdot 4^3$

$160=k\cdot 64$

Solving for k:

$k=\frac{160}{64}=2.5$

The equation is:

$M=2.5\cdot r^3$

Now find r when M=540:

$540=2.5\cdot r^3$

Dividing by 2.5:

$216=r^3$

Taking cube roots:

$r=\sqrt[3]{216}$

r=6

3 0

3 years ago

M&M plain candies come in various colors. According to the M&M/Mars Department of Consumer Affairs, the distribution of

lyudmila [28]

Answer:

A) 0.12. Yes. Choosing a green and blue M&M is possible

B) 0.43. Yes. Choosing a yellow and red M&M is possible

C) 0.78

Step-by-step explanation:

First of all, the summation of the distribution of all colours is;

Σ(all colors ) = 22% + 20% + 23% + 10% + 6% + 6% + 13% = 100%, or 1.

Thus;

a) P(green candy or blue candy) is;

P(GREEN ∪ BLUE) = P(G) + P(BL)

P(GREEN ∪ BLUE) = 6%+6%

P(GREEN ∪ BLUE) = 12% or 0.12

Now, due to the fact that we have to choose ONE candy and only ONE candy at random, then they are mutually exclusive: Yes. Choosing a green and blue M&M is possible

b)P(yellow candy or red candy is;

P(YELLOW ∪ RED) = P(Y) + P(R)

P(YELLOW ∪ RED) = 20% + 23% = 43% or 0.43

Yes. Choosing a yellow and red M&M is possible

c) P(NOT PURPLE)

the probability of having a purple is;

P(PURPLE) = 22% or 0.22

So, the Probability of NOT having a PURPLE is 1 - 0.22 = 0.78

4 0

3 years ago

A company has 15.5×108

Talja [164]

Answer:

1674

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Carlos is analyzing the results of a recent scientific study about gravity. Scientists recorded that the experimental value of g

ASHA 777 [7]

Answer:

The answer is 4.38.

Step-by-step explanation:

You take the experimental value and subtract the accepted value from it. then take that and divide it by the accepted value. When you get your you move the decimal point and round if needed.

8 0

3 years ago