MATHEMATICS HIGH SCHOOL

F(x)=4x^2+7x+18 find f (-9)

Answers

Answer 1
Answer:

Answer: f(-9)= 243

Step-by-step explanation:

f(x) = 4x²+7x -18

f(-9) = 4(-9)²+7(-9)-18

= 4(81) -63-18

= 324- 81

= 243

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Answers

This would be:
1 - (1)/(2) - (1)/(3)

Using common denominator of 6:
(6)/(6)- (3)/(6)- (2)/(6) = (1)/(6)

They should use (1)/(6) of their time.  

PLEASE ANSWER FAST!
Find BDC.
BDC=​

Answers

Step-by-step explanation:

<NDC=<NCD (Given)

<NCD=35°.

<CAN=<DBN (Given)

<DBN=50°.

therefore, <CND = 180-35-35=110.

and <CND and <DNB are linear pair.

<CND+<DNB=180°

<DNB=180-110

<DNB=70.

therefore, <BDN = 180-50-70 = 60.

therefore, <BDC= 35°+60°=95°.

hope this helps you.

Answer:

angle BDC= 95°............

Factor the following equation to solve for "x"; x^{2} - 8x - 20 = 0

Answers

x² - 8x - 20 = 0

Factor the left side:

(x + 2) (x - 10) = 0

That's a true statement if (x = -2) or if (x= 10), so those are your solutions.

x = -2
x = 10

By the way ... you don't factor an equation. You can only factor an expression.

4. A couple has 4 children. What is the probability that they have at least 2 girls?

Answers

6/16 or 3/8 unless you mean percentage

What are 2 thirds of 800

Answers

2/3x800= 1600/3 or 533 1/3
2/3 of 800 is 1600/3 or 533.33 or 533 1/3

If a side of a square is 1/2 ft long what is the perimeter of the square

Answers

Perimeter is the sum of the length of all sides. A square has 4 sides with equal sides. So the perimeter = 4*1/2ft =2ft
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