how to solve an equation using quadratic formula

Answers

Answer 1

Answer:

[tex]{ \rm{x = \frac{ - b \pm \sqrt{ {b}^{2} - 4ac } }{2a} }} \\ [/tex]


Related Questions

Please help me with this problem!

Answers

Answer:

57 degrees

Step-by-step explanation:

It is an isosceles triangle because QP has the same length as OP. So the base angles will be the same.

The point (-1, 5) is reflected over the y-axis. Where is the location of the new image?


(-1, -5)

(5, 1)

(1, 5)

(1, -5)​

Answers

(-1 ,-5) over the y axis

jay wants to buy a pair of shoes that have a regular price of 95. he found them on sale for 45% off. if the store charges 8% tax, how much did he have to pay for the shoes?

Answers

45% of 95 is 42.75. So since they are 45% off subtract. Making the new pre tax cost of the shoes $52.25. 8% of 52.25 for the tax is $4.18. So for the total cost add 4.18+52.25. The total cost paid for the shoes should be $56.43

Alejandro uses the steps below to convert StartFraction 5 over 8 EndFraction to a percent. Five-eighths right arrow 8. 0 divided by 5 = 1. 6. 1. 6 = 160 percent. Which best explains Alejandro’s error? The division was computed incorrectly. The division was completed in the incorrect order. The decimal was moved to the right too many times. The decimal was moved to the right instead of the left.

Answers

Alejandro makes an error in the first steps he divides 8 by 5 which is incorrect he has to divide 5 by 8, and in the second step, he does not multiply the term by 100 and it can be determined by using fraction or percentage.

Given that,

Alejandro uses the steps below to convert 5/8 to a percent.

8 divided by 5 = 1.6.,

1.6 = 160 percent

We have to determine,

Which best explains Alejandro's error?

According to the question,

Alejandro uses the steps below to convert 5/8 to a percent.

8 divided by 5 = 1.6.,

1.6 = 160 percent

The division was computed incorrectly.

The division was completed in the incorrect order. The decimal was moved to the right too many times.

The decimal was moved to the right instead of the left.

Alejandro uses the steps below to convert 5/8 to a percent.

To convert 5/8 into percentages following all the steps given below.

Step1; Firstly 5 is divided by 8,

                   [tex]= \dfrac{5}{8} \\\\ = 0.625[/tex]

Step2; To convert 0.625 into percentage multiplied by 100,

                    [tex]\rm = 0.625 \times 100\\\\= 62.5 \ percent[/tex]

Hence, Alejandro makes an error in the first steps he divides 8 by 5 which is incorrect he has to divide 5 by 8, and in the second step, he does not multiply the term by 100.

For more details about the Equation refer to the link given below.

https://brainly.com/question/18187260

Answer:

Just tell me the letter.

Step-by-step explanation:

if i have decent grades, but miss a lot of school
will they fail me???

Answers

Answer:

I think it's no

Step-by-step explanation:

because you will study hard

what is 5.56 s divided by 6.42 S ​

Answers

Answer:

0.86

step by step explain:

first you want to get a calculator and you want to put in 5.56 divide 6.42

Answer:

= 0.866

Step-by-step explanation:

By moving the decimal point two places to the right, you can convert the divisor 6.42 to a whole number. Then, in the dividend, move the decimal point two places to the right.

Then we have the equation: 556 ÷ 642 = 0.866

and therefore: 5.56 ÷ 6.42 = 0.866

both calculated to three decimal places.

Equation:

The actual equation is attached below as an attachment.

Message:

Hope this helps! I am not the best at math, so sorry if I got it wrong.

Which is the better buy 31 once bottle of katchup for $2.53 Or a 64 once bottle for $5.05

Answers

Answer:

64 once bottle for $5.05

Can someone please take the time out of they’re day and help me with this

Answers

Answer:

30 in

Step-by-step explanation:

18^2 + 24^2 = x^2

324 + 576 = x^2

900 = x^2

30 = x

Answer:

30 in

Step-by-step explanation:

With maths problems, first thing to do is to identify clearly the information that you have (from the question) and what you want to find;

Here, we have a right-angle triangle and given 2 of the sides, we are asked to find the other;

Considering this, if you've learnt it well and done plenty of practice, then you should realise pythagoras theorem can be applied to get the unknown side;

The square of the two given sides added will give the square of the unknown side:

(24)² + (18)² = x²

576 + 324 = x²

x² = 900

x = sqrt(900)

x = 30

A store sells four printers for every five computers. The store sells 40 computers on Saturday. How many printers did it sell on Saturday?

Answers

32 printers were sold:
P:C
4:5
_:40
40/5=8
4x8=32

A. -78
B. 49
C. 53
D. 14

Answers

Answer: 49

Step-by-step explanation:

Solve for x (thank you!)

Answers

5/8 = 21/ (21+y)

there’s the equation, just solve for “y” from there!

A scale of a model has a scale of 1:360.

A. The actual length of the football field including the end zones is 120. how long in inches is the football field in the model?

B How many times the length of the model is the length of the actual stadium

Answers

Answer:

120 yards,360 feet's of length and 53 1/3 yards,160 feet of width

1. Represent the following sentence as an algebraic expression, where "a number" is the letter x.

8 is added to a number.

2. When solving an equation, Bianca's first step is shown below. Which property justifies Bianca's first step?

Original Equation:
4x-5= -4
First Step:
4x= 1

A. multiplication property of equality
B. addition property of equality
C. commutative property of addition
D. commutative property of multiplication

Answers

Answer:

The answer is C since she is adding 5 to both sides

Hope This Helps!!!

Help plz im on a timer at school

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Answer:

it is reduction so the answer is B.

Step-by-step explanation:

determine if the two triangles are congruent.If they are state how you know

Answers

9. yes, 2 congruent sides

10. no

11. yes, 1 congruent side and angles

12. yes, 1 congruent side and angles

13. yes, 1 congruent side and angles

14. yes, 2 congruent sides

15. yes, congruent sides and angles

16. yes, congruent angles and sides

Please help! I need answers

Answers

Hill family's sprinkler was on for 25 hours, while Moore family's sprinkler was on for 35 hours

Represent the time the Hill family and the Moore family use the sprinkler with H and M.

So, the total time is:

[tex]H + M = 60[/tex]

And the rate is:

[tex]25H + 20M = 1325[/tex]

Make H the subject in [tex]H + M = 60[/tex]

[tex]H= 60 - M[/tex]

Substitute 60 - M for H in [tex]25H + 20M = 1325[/tex]

[tex]25(60 - M) + 20M = 1325[/tex]

Open brackets

[tex]1500 - 25M + 20M = 1325[/tex]

Collect like terms

[tex]- 25M + 20M = 1325 - 1500[/tex]

[tex]- 5M = -175[/tex]

Divide both sides by -5

[tex]M = 35[/tex]

Recall that:

[tex]H= 60 - M[/tex]

So, we have:

[tex]H = 60 - 35[/tex]

[tex]H = 25[/tex]

Hence, Hill family's sprinkler was on for 25 hours, while Moore family's sprinkler was on for 35 hours

Read more about system of equations at:

https://brainly.com/question/14323743

The following circular spinner has 10 sections of equal size. If the spinner is spun twice, what is the probability that the spinner lands on an odd number both times?

Answers

Answer:

The chance of anding on A for one spin is 90+45360=38. So the probability of that happening twice in a row is 38×38=964.

Step-by-step explanation:

hope this helps you mark me brinilylist

Can someone help me on this question? The question is down below...

Answers

Answer:12m

Step-by-step explanation:

Because you are given that this is a right angled triangle, you can apply the pythagoras theorem where a^2 = b^2 + c^2

15^2 = 9^2 + x^2

225-81 = x^2

144 = x^2

x = 12m

the length of a is 12 m

Olivia reads 72 pages in 40 minutes. How many pages can she read per minute?

Answers

Answer:

1.8 pages a minute

Step-by-step explanation:

Olivia can read 1.8 pages per minute.

pls help me with my maths if you can​

Answers

Answer :

A) R- d✖️5= x

B) m/4 - b = x
Ok done. Thank to me :> ✅

please help me, and be nice, don't be a jer.k (you know who you are..)


ty :)

Answers

Answer:

y=-1/2x+3

Step-by-step explanation:

Step-by-step explanation:

Subtract x both sides

2y = 6 + (-x)

Divide by 2 both sides

y = 3 + (-1/2x)

y = -1/2x + 3

Consider the graph of the equation y=(x–9)? – 7. Compared the graph of y=x”, how has the vertex been shifted (left/right and/or up/down) and by how many units?

Answers

Answer:

Shifted to the right by 9 units, and down by 7 units

Step-by-step explanation:

y=x is the origin.

(x-9) shows that the graph has moved 9 units to the right, as what is inside the parentheses indicates the opposite direction

(you can be able to review why this is from online resources or you can ask your teacher)

the -7 shows that the graph moves 7 units down the graph, it's outside the parentheses, so it follows the same direction

let's sum up:

for this situation,

- what is inside the parentheses is the x

- what is outside the parentheses is the y

- the x-values direction shifts opposite from the sign (+/-)

- the y-values direction shifts like the sign (+/-)

So,

the vertex has been shifted to the right by 9 units, and down by 7 units compared to y=x.

answer this for 10 points

Answers

Answer:

1 2 5 and 6

Step-by-step explanation:

1,2,5,6, each are a fraction

3/5 of a number is 30. What’s the number?

Answers

The number is 50

3/5x=30
Multiply each side by 5/3
x=50
Answer:a = 50Step-by-step explanation:3/5 x a = 30=> 3a/5 = 30=> a/5 = 10=> a = 50Conclusion:

Therefore, the number is 50.

Hoped this helped.

[tex]-BrainiacUser1357-[/tex]

What is the answer to 7-x²

Answers

Answer:

7-1x^2

Step-by-step explanation:

Amelia, Luis, Shauna, and Clarence used different approaches to solve the inequality
7.2b + 6.5 > 4.8b – 8.1.

Amelia started by subtracting 7.2b from both sides to get 6.5 > –2.4b – 8.1.
Luis started by subtracting 4.8b from both sides to get 2.4b + 6.5 < – 8.1.
Shauna started by subtracting 6.5 from both sides to get 7.2b > 4.8b – 14.6.
Clarence started by adding 8.1 to both sides to get 7.2b + 14.6 > 4.8b.
Which student’s first step was incorrect, and why?

Answers

Answer:

B

Step-by-step explanation:

Luis started by subtracting 4.8b from both sides to get 2.4b + 6.5 < – 8.1.

Answer:

Luis’s, because he flipped the inequality sign when he subtracted

Step-by-step explanation:

Luis’s, because he flipped the inequality sign when he subtracted

.pleseee help so important ​

Answers

my answer with solving steps

#CARRYONLEARNING

LOVEUALL

Find a quadratic model in standard form for the set of values.
(-2, 18), (0, 4), (4, 24)

Answers

4x^2 + 2x - 4

Hope this helps

Someone please help no need to show work just answer (I will give brainliest)

Answers

Answer:

image 1 : 3.78

image 2 : 10.20

Step-by-step explanation:

I haven't done geometry in a bit but I'll try to help!

Greg has entered a cycle race of 125 km. he rides the first 85 km in 2.5 hours. he rides the rest of the way in 2 hours. How much faster did he ride during the first part of the journey compared to the second?

Answers

Answer:

He rides 14km/hr faster

Step-by-step explanation:

Speed = distance/ time

In the first part,

Speed= 85/2.5

= 34km/hr

In the second part,

Distance= 125-85

=40km

Speed= 40/2

=20km/hr

How much faster did Greg ride ?

34-20= 14km/hr

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