1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ch4aika [34]
3 years ago
5

8. If you were going to use the quadratic formula to solve the following equation and a = 9, what number would you use as the va

lue for the variable 'b'? 3x + 8 = 9x2 The variable 'b' = ____. (4.0 Points) Part 9 - - 0/1 Answered Questions, 4.0 Points
Mathematics
1 answer:
ludmilkaskok [199]3 years ago
4 0

Answer:

Remember, for solve the quadratic equation

ax^2+bx+c=0

we use the quadratic formula

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

We have the equation 3x+8=9x^2 since a must be 9 then we pass the entire left side of the equation to the right side. We get the equation:

3x+8=9x^2\\8=9x^2-3x\\0=9x^2-3x-8

Then, observe that a=9 and b=-3

You might be interested in
What do you do when ur bathtub wont work
lubasha [3.4K]

Answer:

Sometimes I l i c k  myself like a cat but other times I'll just get orange juice and pour it on myself. Either way works great!

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
A bag contains 5 blue marbles, 6 red marbles, and 9 green marbles. Two marbles are drawn at random, one at a time and without re
ArbitrLikvidat [17]
Should be C. 1/19. because if there's 20 maebles in the bag and without replacing the marble then it actually would be 2/18
5 0
3 years ago
The fitted regression is Sales = 832 − 28.2 Price. (a-1) If Price = 1, what is the prediction for Sales? (Round your answer to 1
almond37 [142]

Answer:

Part (a-1): The prediction for Sales is 803.8.

Part (a-2): The correct option is: An increase in price decreases sales.

Part (B): The prediction for sales is 211.66

Part (C): The intercept is meaningful as sales will be maximized when price is zero.

Step-by-step explanation:

Consider the provided regression:

Sales = 832 − 28.2 Price

(a-1) If Price = 1, what is the prediction for Sales?

Substitute Price = 1 in above regression.

Sales = 832 − 28.2 (1) = 803.8

Hence, the prediction for Sales is 803.8.

Sales (a-2) Choose the correct statement.

Here we can observe that as we increase the price, sales decrease.

Thus, the correct option is: An increase in price decreases sales.

(b) If Price = 22, what is the prediction for Sales?

Substitute Price = 22 in above regression.

Sales = 832 − 28.2 (22)

Sales = 832 − 620.4

Sales = 211.66

Hence, the prediction for sales is 211.66

Sales (c) Choose the right option.

As we increase the price, sales decrease that means the sales will be maximum if the price is 0.

The intercept is meaningful as sales will be maximized when price is zero.

3 0
3 years ago
In figure find the area of the red part.​
larisa [96]

Step-by-step explanation:

Given : A rectangle 4 x 8 , a semicircle

Diagonal intersecting semicircle  

To Find :Area of red part

<h3>Solution:</h3>

Angle AC make AB   α = ∠BAC

tan α = BC/AB = 4/8 = 1/2

=> α = 26.565°

∠ECA = ∠BAC = α

EC = EF = 4

=> ∠CEF = 180° - 2α

∠AED = 45°  as   AE is  diagonal of Square of side  4

=> ∠AEF  + 180° - 2α + 45° = 180°

=>  ∠AEF =  2α - 45°  = 8.13°

in Left side area  between square  and circle is split in 2 Equal parts

(1/2) area - area AFG = area of Red part

in Left side area  between square  and circle  = 4² - (1/4)π4²

= 3.4336 sq unit

half  =  1.7168 sq unit  

Now find area AFG = area ΔAEF - sector EGF

area ΔAEF  

AE = 4√2  , EF = 4    angle = 8.13°

area ΔAEF   = (1/2) 4√2 * 4 sin 8.13° = 1.6 sq unit

area  sector EGF  = (8.13/360)π4² = 1.135  sq unit

area AFG  = 1.6 - 1.135  = 0.465 sq unit

Area of Red part = 1.7168 - 0.465 sq unit

= 1.2518 sq unit

= 1.252  sq unit

= 1.25 sq unit.

Hope this helps!!

5 0
2 years ago
Read 2 more answers
20 POINTS
victus00 [196]

Ni is not correct. To solve the equivalent quarterly interest rate, the annual interest rate should be multiplied by the correct ratio. Since the annual interest rate is 4% per year. So in 1 quarter is equal to 0.25 year.

<span>(4% / year) (0.25 year/ 1 quarter) = 1% per quarter</span>

8 0
3 years ago
Other questions:
  • it takes Jupiter 11.9 years to orbit,or go around the sun. Saturn takes 17.6 more years than Jupiter to orbit the sun. About how
    5·1 answer
  • Las bases de un prisma recto son dos triangulos rectangulos cuyos catetos miden 1.5 cm y 1.8 cm, respectivamente, el prisma tien
    9·1 answer
  • A cylindrical oil drum has a diameter of 2 feet and a height of 3 feet what is the volume of the oil drum?
    8·1 answer
  • Y = x2 + 4x – 117<br><br> i need to know the roots and vertex
    11·1 answer
  • True or False? Each point on the perpendicular bisector of a segment is equidistant from the endpoints of the segment.
    14·1 answer
  • Write the expression add 17,044 and 32,760 and then multiply by 1/2​
    9·1 answer
  • Please help ASAP!!!
    14·1 answer
  • I NEED HELP SOLVING THIS MATH PROBLEM.
    6·1 answer
  • Sea f(x)=x²+x+1
    8·1 answer
  • Find the inverse of each function. Is the inverse a function? f(x)=x⁷
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!