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defon
3 years ago
6

Multiply 16(20 n+18)

Mathematics
1 answer:
liraira [26]3 years ago
4 0
Distribute (16x + 20n + 16 * 18)

Simplify 16 * 20n to 320n (320n + 16 * 18)

Simplify 16 * 18 to 288


Therefore in conclusion the answer would be 320n + 288.
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Use the discriminate to determine the number and the nature of the solutions of the giving equation.
PolarNik [594]

Answer:

Since b^2 -4ac = 256 we have 2 real distinct root roots

Step-by-step explanation:

4x^2+12x=7

We need to subtract 7 to get it in the proper form

4x^2+12x-7=7-7

4x^2+12x-7=0

The discriminant is b^2 -4ac

when the equation is ax^2 +bx+c

so a =4   b=12 and c=-7

(12)^2 - 4(4)(-7)

144 +112

256

If b^2 -4ac > 0 we have 2 real distinct roots

If b^2 -4ac = 0 we have one real root

If b^2 -4ac < 0 we have two complex root

Since b^2 -4ac = 256 we have 2 real distinct root roots

7 0
3 years ago
A class of 25 students has 12 females. What is the ratio of males to females?
Andreas93 [3]
The ratio is 13 males and 12 females or 13:12
7 0
3 years ago
Find a rational number between -1/3 and 1/2
noname [10]

Answer:

1/6

Step-by-step explanation:

Rational numbers between two rational numbers:

  •      First find the Least Common Denominator for 2 and 3
  • Then find equivalent fractions with the LCD.

LCD of 2 and 3 = 6

\sf \dfrac{-1}{3}=\dfrac{-1*2}{3*2}=\dfrac{-2}{6}\\\\\dfrac{1}{2}=\dfrac{1*3}{2*3}=\dfrac{3}{6}

\sf Rational \ number \ between \ \dfrac{-2}{6} \ and \ \dfrac{3}{6} \  is \  \bf \dfrac{1}{6}

5 0
2 years ago
Can someone please help me <br> How do I change 0.987 into a fraction on this calculator?
Vilka [71]

Answer:

I dont know how to but 0.987 as a fraction is 987/1000

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
A certain hereditary disease can be passed from a mother to her children. Given that the mother has the disease, her children in
uranmaximum [27]

Answer:

(a) P=0.694

(b) It is independent, beacuse the probability of having the disease for the children depends only on her mother condition (if she has the disease or not), not the condition of his brothers and sisters.

(c) P=0.25

Step-by-step explanation:

(a) If the mother has 0.33 probabilities of having the disease, the probability of the children having the disease is equal to the product of the probability of the mother having the disease (0.33) and the probability of inherit it (0.50).

So the probability of one child of having the disease is 0.33*0.5=0.167. The probability of not having the disease is then (1-0.167)=0.833

The probability of both children to not have the disease is 0.833^2=0.694.

(b) It is independent, beacuse the probability of having the disease for the children depends only on her mother condition (if she has the disease or not), not the ones of his brothers and sisters.

(c) If the mother has the disease, the child have a probability of 0.5 of having the disease.

The probability, given that the mother has the disease, of both child not having the disease is 0.5^2=0.25.

4 0
4 years ago
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