Answers
Answer:
Step-by-step explanation:
Unless we set x^2 + 8x + 15 equal to zero, we don't have an equation to be solved. I will assume that the problem is actually x^2 + 8x + 15 = 0.
The coefficients of this quadratic are {1, 8, 15}, and so the "discriminant" b^2 - 4ac is (8)^2 - 4(1)(15), or 4. Because the discriminant is positive, we know that there are two real, unequal roots.
Continuing with the quadratic formula and knowing that the discriminant is 4, we get:
-8 ± √4 -8 ± 2
x = ---------------- = --------------- , or x = -2 ± 1: x = -3 and x = -5
2 2
Related Questions
4(b-2)-10=2(b+3)
B=
PLEASE HELP ME!!!! Show work too
Answers
Answer:
B = 12
Step-by-step explanation:
Give Brainllest plz
What is the missing constant term in the perfect square that starts with x^2+\dfrac{1}{2}xx
2
+
2
1
xx, squared, plus, start fraction, 1, divided by, 2, end fraction, x ?
Answers
Answer:
1/16
Step-by-step explanation:
Given the expression;
[tex]x^2+\dfrac{1}{2}x[/tex]
To find a constant that will make it a perfect square, we will use the square if the half of coefficient of x
Coefficient of x = 1/2
half of Coefficient of x = 1/2*(1/2)
Half of Coefficient of x = 1/4
square of the half of coefficient of x = (1/4)^2
square if the half of coefficient of x = 1/16
hence the constant that will make it a perfect square is 1/16
Maria wants to know what time it is, but after looking at her analog clock, notices that the numbers are all missing! She notices that the minute hand is pointing straight up, and that the angle measure between the hour and minute hand is 90 degrees. If she knows that the time must be between 1:00 and 5:30, what time is it?
Answers
Answer:
3:00
Step-by-step explanation:
If the minute hand is pointing straight up, it means that the time is at an exact hour (ex. 1:00, 2:00, not 1:30, etc.).
If the angle between the hour and the minute hand is 90 degrees, then we know that the time is either 3:00 or 9:00.
However, because the time must be between 1:00 and 5:30, it must be 3:00.
I hope this helps!
Please help if you know the answer please
Answers
Hope this helps
Please mark brainliest
Let me know if this is wrong
Have a good day
..;)
Answer:
i think the answer is b. 0.19
Step-by-step explanation:
let me know if this is incorrect
Can someone please help me answer this question asap thank you no links please thank you
Answers
Answer:
7 cm
24.5 cm
0.4 cm
69.91 cm
A bicyde store costs $2400 per month to operate. The store pays an average of 570 per bike. The average selling price of each bicyde is $100. How many bicydes must the store soil each month to break even?
The store must sel bicycles each month to break even.
(Type a whole number)
Answers
Answer:
It can't buy a bike for 570 and sell it fo 100. They'll just be losing money on top of rent
Step-by-step explanation:
I don’t understand this. Please help
Answers
Answer:
x = 150
Step-by-step explanation:
(n-2)180 (n = the amount of sides)
(12 - 2)180
(10)180
1800
1800/12 = 150
Classify the real number.
[tex] \sqrt{15} [/tex]
Answers
Answer:
IrrationalStep-by-step explanation:
Firstly,
According to rational and irrational,
[tex] \sqrt{15} \: is \: irrational[/tex]
Since,
Natural numbers, Whole Numbers and Integers all come under Rational number.
Hence,
[tex] \sqrt{15} [/tex]
Is an irrational number.
Jenny buys 22 sports drinks for her soccer team. They are in sale for $0.35 off per drink. Jenny paid $18.70 for the 22 sports drinks. How much is the original price of each drink
Answers
Total saved from 22 drinks=22x$0.35
=$7.70
Original price of 22 sports drinks=$18.70+$7.70
=$26.40
Original price of one sports drink=$26.40÷22
=$1.20
The price of each drink is $1.20.
-8 = 4 ( x - 1 ) solve for x
Answers
Answer:
-1
Step-by-step explanation:
If P(A) = .24 and P(B) = .52 and A and B are mutually exclusive, what is P(A or B)?
(a).1248
(b).28
(c).6352
(d).76
Answers
quick help plzz!!!!!!!
Answers
(HALP ILL GIVE BRAINLY!! ITS A MULTIPLE CHOICE)
Answers
Answer:
(1) is the answer
hope it helps
Step-by-step explanation:
(1)
It's the first one. Hope this helps!!
Salma made 378 for 18 hours of work.
At the same rate, how much would she make for 5 hours of work?
Answers
Answer:
Sorry, I can't help you with that :( I hope someone else can tho!
Step-by-step explanation:
PLEASE HELP ILL GIVE BRAINLIEST
Answers
Answer:
XY i think
Step-by-step explanation:
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
Answers
Answer:
A. When the team scored 52 points, the median number decreased.
Step-by-step explanation:
The median now is 88. Without the 52, (using the median formula,) it would become 88.5. Since 88.5 is larger than 88, it means the median decreased after 52 was added. There was no change when 91 was added.
Anastasia has been accepted into a 4- year University as an architect student. She was offered a scholarship of $17,800 per year. The cost per year is $17,400 in tuition and fees, $10,350 for room and board, and 850 for books. What would the cost be after attending school for four years?
Answers
Answer:
256,800 I believe
Step-by-step explanation:
you add up all the numbers and multiply by 4
HELP PLS VERY IMPORTANT
Answers
Hope this helps
Seventy-five 6th grade students chose to watch a movie on the last day of school. This is 25% of the 6th-grade class. How many total students are in the 6th grade? *
Answers
Answer:
300 students in total
Step-by-step explanation:
25% out of 300 is 75
300 - 75 (25%) = 225
25% (75) + 75% (225) = 100% (300)
Hopefully this helps :3 sorry if wrong :( plz mark brainiest if correct :D your bootiful/handsome! Have a great day luv <3
-Bee~
Answer:
300
Step-by-step explanation:
Find the perimeter. Simplify your answer.
Answers
Answer:
5c^2+2cd-2d^2-15
Step-by-step explanation:
Hello, to find the perimeter of any shape, you just add all the side together. In this picture, you would add all the sides up like this:
4c^2+4cd+12+-5d^2-5cd+2+c^2-d^2+1+3cd+4d^2-30
Then, combine like terms (add all of the numbers with the certain variable together) and you would get the answer which is:
5c^2+2cd-2d^2-15
Please help someone I need an answer
Answers
Answer:
Step-by-step explanation:
Right Isosceles Triangle
Side a = 9
Side b = 9
Side c = 12.72792 = 9√2
Angle ∠A = 45° = 0.7854 rad = π/4
Angle ∠B = 45° = 0.7854 rad = π/4
Angle ∠C = 90° = 1.5708 rad = π/2
hope you pass your retest ;)
I need this rn pls no links I will report
Answers
Answer:
the answer is 8
Step-by-step explanation:
that is the answer "8"
SOMEONE DO THIS QUICKLY! THIS IS DUE IN 30 MINS!
Answers
Answer:
2) a) Neither; b) Adjacent; c) Vertical; d) Adjacent; e) Neither; f) Vertical
3) Vertical, x = 135
4) Adjacent, x = 57
5) Adjacent, c = 45
6) Adjacent, x = 118
7) Vertical, x = 47
8) Adjacent, x = 58
9) Adjacent, x = 9.67
10) Adjacent, x = 10
11) Vertical, x = 20
Step-by-step explanation:
A pop quiz has 4 multiple choice problems, all with 3 possible answers (A, B, or C,). You need to get at least 4 correct to pass. If you are completely unprepared and have to guess on every question, what is the probability that you will pass the quiz?
Answers
Answer:
The probability is 1/4, for me if I need to guess all blankly.
But if I am unprepared but if I use my brain it can be 3/4
Sooo, hope it helps!!!
help pls !
i’ll mark brainliest to whoever answers it right first.
thanks !
Answers
step-by-step explanation: 1/2 (a+b) x h is area of trapezoid. So that would be 40
then area of circle is pi x radius squared. So that is 50.24 roughly.
so 50+40=90
and yeah
hope this helped :))
A store sells avocado for $2.80 per pound. What is the cost of a 2 1 pounds of avocado?
4
Answers
Evaluate each expression for a = 3, b = 4, and c = 6. bc + 5a
Answers
Answer:
39
Step-by-step explanation:
bc+5a
Substitute values
(4)(6) + 5(3)
= 24 + 15
= 39
I have 40 oranges i give 7 to john and 9 to bala what fraction did i give away reduce to the lowest term
Answers
Answer:
24.
Step-by-step explanation:
I think. I'm not sure sorry! I hope I helped a little though.
You place four orders for 50 tennis rackets which cost $65 per racket you receive all 200 rackets there is a delivery charge of $15 per order what is your average cost per racket including delivery charges
Answers
Answer:
65.30
Step-by-step explanation:
1. 50x4=200
2. 200x65=13,000
3. 13,000 + (15x4)
4. 15 x 4 = 60
5. 13,000 + 60
6. 13,060/200 = 65.3
Your average cost per racket including delivery charges is $65.30.
First step is to calculate the cost of 200 rackets
Cost of 200 rackets= 200 ×$65
Cost of 200 rackets= $13,000
Second step is to calculate the total delivery fee
Total Delivery fee= 15 × 4
Total Delivery fee=$60
Third step is to calculate the total cost including delivery cost
Total cost including delivery cost=$13,000 + $60
Total cost including delivery cos = $13,060
Fourth step is to calculate the Average cost
Average cost per rackets=$13,060/200
Average cost per rackets=$65.30
Inconclusion the average cost per racket including delivery charges is $65.30.
Learn more here:
https://brainly.com/question/11502325
Which of the expressions below is equivalent to 4x^2 / 12x^2-4??[tex]: 4x^2/ 12x^2 - 4[/tex]
Answers
Answer:
b
Step-by-step explanation: