The quadratic x squared - 4x -21 find values of a and b

Answers

Answer 1
So the equation to remember is ax^2+bx+c so since the equation is x^2-4x-21 then a is x^2 and b is -4x

Related Questions

Is 1 greater than, less than, or equal to 8/10?

Answers

Answer:

Greater than ( > )

Step-by-step explanation:

Answer:

Greater than

Step-by-step explanation

1 is greater than 0.8

What is the area of this figura?​

Answers

Answer:

total area of the figure is: 1568 yd^2

Step-by-step explanation:

The area of the figure is the addition of the areas of a square and a rectangle:

The square on top that measures  28 yd times 28 yd, therefore its area is:

28^2 yd^2 = 784 yd^2

The rectangle at the bottom measures: 56 yd times 14 yd, therefore its area is:

Area rectangle = base x height = 56 yd x 14 yd = 784  yd^2

Then, the total area is the addition of these two:

Area of square + area of rectangle = 784 yd^2 + 784 yd^2 = 1568 yd^2

Sophia uses 3 3/4 cups of flour for each cake she makes. She has a 10-pound bag of flour that costs $8.79 and contains 152 quarter-cup servings.

Question 1
Part A

How many cakes can Sophia make with this flour?

Answers

The number of cakes Sophia can make is 10.

The bag of flour contains 152 quarter-cup servings. So, the quantity in t he bag has to be divided by four.

Number of cups = 152 / 4 = 38 cups

In order to determine the number of cakes she can make, divide the number of cups in the bag by the cups needed to make one cake.

38 ÷ 3 3/4

38 ÷ 15/4

38 × 4/15 = 10.1 cakes

To learn more about division, please check: https://brainly.com/question/808272

Sophia will be able to make 10 cakes with this amount of flour.

Since Sophia uses 3 3/4 cups of flour for each cake she makes, and she has a 10-pound bag of flour that costs $ 8.79 and contains 152 quarter-cup servings, to determine how many cakes can Sophia make with this flour you must perform the following calculation:

3/4 = 0.75 (152/4) / 3.75 = X 38 / 3.75 = X 10.13 = X

Therefore, Sophia will be able to make 10 cakes with this amount of flour.

Learn more about maths in https://brainly.com/question/25815188

Daisy is making lemonade with water and lemons. Based on the table below, how many lemons are needed for 24 oz. of water?

ANSWER NOW PLEASE

Answers

there’s literally no table how can we find the answer
clearly, provided on the info you gave me, its 201972.719 lemons

7 people are going to share an 84 oz bottle of soda how many ounces will each person get to drink

Answers

Answer:

12

Step-by-step explanation:

divide 84 by 7.

Answer:Each person should get 12 ounces if they share it evenly.

Step-by-step explanation:I divided the number of ounces by the number of people splitting it.

if you have the answers send em pls

Answers

Step-by-step explanation:

area of rec= length×width

=10×4

= 40

radius= diameter/2

=4/2 = 2

area of semicircle= πr²/2

=22/7×2×2×1/2

=6.28

=6.3

adding both

we get,

=40+6.3

= 46.3

Use the formula to determine the slope of the line containing the two points (-6,6) and (-3,4)

A. -2/3
B. 7/12
C. -3/2
D. -2/9

Answers

4-6
-3-(-6)
-2/3
-2/3 is the slope
A. -2/3 is the slope and answer.

Which equation to the right is ture

Answers

Step-by-step explanation:

there's no equation. so we dont know

Answer:

Where is the equation?

Step-by-step explanation:

A store is randomly giving away gift cards to the first 150 customers. They are giving 130 gift cards that have a value of $5 each and 15 gift cards that have a value of $50 each. The rest of the gift cards have a value of $100 each. Which is the probability that a customer will get a $100 gift card?

Answers

Answer:

1/30

Step-by-step explanation:

The total number of cards is 150. Subtract the numbers of the other values, 130 and 15 to get the number of $100 cards.

150 -145 = 5

5/150 is the number out of the total.

Simplify to get the probability: 1/30

The students in a class were asked which hand they preferred to use
for writing. The bar graph shows the results. Find the total number of
students who had a preference.

Answers

Answer:25

Step-by-step explanation:

Ana and her friends are decorating the gym for a dance. They need 270 balloons. The balloons are only sold un packages. Tere are 50 balloons in each package.

Answers

Answer:

Step-by-step explanation:

270 div

pls help asap

An administrative assistant can type 100 words in 90 seconds. What is the assistants rate of typing in word per minute

Answers

66 because you divide 100 by 90 that multiply that number by 60

review the graph. given a pair of complex numbers, z1=5 and z2=-6i, let z3=3i+z1 and z4=z2-2. In which quadrant is z3-z4 located?
A. Quadrant 1
B. Quadrant 2
C. Quadrant 3
D. Quadrant 4

Answers

Answer:

A

Step-by-step explanation:

z₃ - z₄ is located in Quadrant 1, the correct option is A.

What are complex numbers?

The numbers that can be expressed in the form of a + ib are called Complex numbers, i is called the iota, whose value is equal to the square root of -1.

These are imaginary numbers.

The complex numbers are

z₁ = 5

z₂ = -6i

z₃ = 3i +z₁

z₃ = 3i + 5

z₄ = z₂ - 2

z₄ = -6i -2

The mathematical operations in all the complex numbers are performed similarly in real numbers,

The like terms are grouped together.

The subtraction of the complex numbers has to be determined.

z₃ - z₄ = ( 3i + 5) - ( -6i -2)

z₃ - z₄ = 3i +6i +5 +2

z₃ - z₄ = 9i +7

The constant and the imaginary term depict the x and y coordinate respectively.

As both the terms are positive, it lies in Quadrant 1.

To know more about Complex Number

https://brainly.com/question/10251853

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In the accompanying diagram ab is tangent to circle O at B and ACD is a secant.

If AB=9 and AD=27, find AC

Answers

Answer:

AC = 3

Step-by-step explanation:

Based on tangent and secant theorem, thus:

AB² = AC × (AC + CD)

AB = 9

AD = AC + CD = 27

Plug in the values

9² = AC × (27)

81 = AC × 27

Divide both sides by 27

81/27 = AC

3 = AC

AC = 3

Explain your answer !

( WILL GIVE BRAINLST)

Answers

last one bc it jus is the last one so put in the last one bc the last one is the right one

Answer:

C

Step-by-step explanation:

I think it would be easiest to see these numbers in decimal form to determine which number is the greatest and which is the smallest.

2 as a decimal=2.0

Square root of 7 as a decimal= 2.64575131106

1/3 as a decimal= 0.3333333333333333333333333333333333333333333...

So, 0.3333333...<2.0<2.64575131106

or 1/3, 2, square root of 7

Answer is C

Eight bricks are laid end to end along the edge of a flower bed. Each brick is 1 1/2 inches long. How long is the row of bricks, in inches?

Answers

Answer:

12 inches

Step-by-step explanation:

What information is useful?

Each brick is: 1 1/2 inches long.

There are 8 bricks used.

Let's multiply 1 1/2 x 8 = 12 inches.

You can convert into other metrics but depending on your question it is in inches.

Please help nobody is helping so far please help

Answers

The surface area is 516 square feet

Answer: 152ft square

Hope this helps!

Item 2
Which of the following is not another way of expressing 88 out of 100?


22/25

0.088

88%

0.88

Answers

Answer:

The answer is B: 0.088

Step-by-step explanation:

22/25, multiply both sides by 4 to get 88/100

88% is 88/100

0.88 is 88/10

B :)

0.088 would be a lot less than a whole number

Can I please have help​

Answers

Answer:

65

Step-by-step explanation:

Because is cross angles and 130:2 is 65

what is the equivalent ratio of 2 over 9?

Answers

Answer:

4/18, 6/27, 8/36, 10/45, 12/54, 14/63, 16/72, 18/81, 20/90, 22/99 and many more

Step-by-step explanation:

Hope this helpss!!

Write a real-world problem for the given inequality,15x + 3 < 14x + 5

Answers

Answer:

b

Step-by-step explanation:

Find the 96 th derivative of f(1) = sin c.
f (96) (2)
=

Answers

The derivatives of sin(x) follow a simple pattern:

f(x) = sin(x)

f '(x) = cos(x)

f ''(x) = - sin(x)

f '''(x) = - cos(x)

f ''''(x) = sin(x)

and so on. 96 is a multiple of 4, so

f ⁽⁹⁶⁾(x) = sin(x)

Based on her recipe, Elena knows that 5 servings of granola have 1,750 calories. If she eats 2 servings of granola, how many calories does she eat? *

Answers

Answer:

5 / 1750 = 2 / x

5x = 3,500

x = 700

 

Step-by-step explanation:

Every two servings she eats, she eats 700 calories

simplify the expression :
1.7h - 8.9 + 3

Answers

Answer:

1.7h - 5.9

Step-by-step explanation:

Combine the like terms -8.9 and 3 to get -5.9. Since it's negative, you subtract.

1.7h - 8.9 + 3 = 1.7h (-8.9 + 3) = 1.7h + 5.9

The equation w(t)=100+40t models the weight (w(t) in grams) of a male white laboratory rat t weeks after its birth.

What is the rate of change? What does it mean in the context of the problem?
What is the y-intercept? What does it represent in the context of the problem?

Answers

Answer:

Step-by-step explanation:

melanie walks 2 large dogs and 8 small dos as part of her dog walking business the simplified ratio of large dogs to small dogs is

Answers

Answer:8:36

Step-by-step explanation:

Answer: 1 : 4

Step-by-step explanation:

The simplified ratio of large dogs to small dogs is 1 : 4.

The original, unsimplified ratio would be 2 : 8, because there are 2 large dogs for every 8 small dogs. But to simplify it, we can divide each side by 2.

2 ÷ 2 = 1, while 8 ÷ 2 = 4.

Therefore, the simplified ratio of large dogs to small dogs is 1 : 4.

Hope this helps!

x/y if?
a) x=y/3

b) y=x+3

c) x=y * 3

d) y=x-3

Answers

Answer:

(c) x=y*3 is the correct answer

if 4/5x =16, what is the value of -2x-15

Answers

Answer:

-55 I believe

Step-by-step explanation:

Solve the System of Equations using Substitution.
-3x+2y=12
x=2y-8

Answers

Answer:

(-2,3)

Step-by-step explanation:

x=2y−8;−3x+2y=12

x=2y−8

−3x+2y=12

−3(2y−8)+2y=12

−4y+24=12

−4y+24+−24=12+−24

−4y=−12

-4y=-12

y=3

x=2y−8

x=(2)(3)−8

x=−2

Amy is scuba diving. She starts at – 15.5 m relative to the ocean surface. She swims
down 4.2 m. Then she swims up halfway to the surface. What is her position
relative to the ocean surface?
(Will give Brainlist)

Answers

Answer:

-9.85

Step-by-step explanation:

-15.5 - 4.2 = -19.7

Negatives work like positives

19.7 / 2 = 9.85

Turn that into a negative

-9.85

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