Answers
ax² + bx + c = 0
discriminant = b² - 4ac
----> x² + 7x + 12
---> Discriminant of this equation = 7² - 12.1.4 = 49 - 48 = 1 (Positive discriminant)
x = (-7 + 1)/(2.1) = -6/2 = -3
or
x = (-7 - 1)/(2.1) = -8/2 = -4
Therefore, this equation has two real solutions and has a positive discriminant.
The correct answer is B
Related Questions
3m+n=10
5m-2n=2
what is the answer for this one
Answers
Answer:
m = 2
n = 4
Step-by-step explanation:
Ok so to solve this, you want to get it so there is only one variable and then solve that equation. To do this, you can start by doing:
3m + n = 10
multiply both sides by 2
6m + 2n = 20
now, in both of your equations you have 2n so you can add the two equations:
6m + 2n = 20
+ 5m - 2n = 2
11m = 22
divide both sides by 11
m = 2.
Now, plug this value into the original equation, 3m + n = 10:
3 * 2 + n = 10
6 + n = 10
subtract 6 from both sides
n = 4
Which graph represents the inequality x > 23 ?
Answers
Step-by-step explanation:
step 1. x > 23 means x values greater than 23 but not equal to 23.
step 2. the graph would have an open circle above 23 and a line with an arrow at the end pointing right.
Answer:A
Step-by-step explanation:
Solve: 3/7 * 6/11 * 2/3. Simplify if possible. Leave answer in improper format.
Answers
Answer:
Exact Form:
12 /77
Decimal Form:
0. 155844
Step-by-step explanation:
Whats The Awnser
vertical angles theorem
corresponding angles postulate
same side interior angles theorem
alternate interior angles theorem
Answers
Answer:
angle 1= 81
Step-by-step explanation:
corresponding angles
angle 2 = 180-81 = 99
Answer:
aa a
Step-by-step explanation:
k77
A salesperson works 40 hours per week at a job where she has two options for being paid. Option A is an hourly wage of 23$. Option B is a commission rate of 4% on weekly sales. How much does she need to sell this week to earn the same amount with the two options?
Answers
Answer:
maybe 17% as u look at the question u will understand
I did:
40 x $23 = $920 to get the weekly amount for option A.
She needs to sell $575 to earn the same.
Because if you do
575 x 4/100 you get $23
Jessie stacked photographs of 6 zoo animals on top of each other to create a display. Each photo is 14 1/4 in. high. How high is the display?
Answers
Answer:
85 1/2 inches
Step-by-step explanation:
14 1/4 x 6 = 85 1/2 inches
Hope that helps!
1. (-13.8) and (3, 12)
Answers
Hello!
What do you need me to solve?
-1/4(d+1)<2
HELP ME PLEASE
Answers
Answer: u suck at math just dont do it duh
Step-by-step explanation: its five
which algebraic expression represents "the difference of fofty-four and seven times a number
Answers
Answer:
44-7x
Step-by-step explanation:
Lilly, Madelyn, Natalie, and Olivia each walked from their houses to the mall. Lilly walked 1/4 mile, Madelyn walked 3/8 mile, Natalie walked 5/6 mile, and Olivia walked 7/12 mile. what is the order of these distanced from least to greatest?
Answers
Answer:
1/4, 3/8, 7/12, 5/6
Step-by-step explanation:
First, change all the fractions so they have the same denominators. The least common denominator is 24. 1/4=6/24 3/8=9/24 5/6=20/24 7/12=14/24
Now, put them in order from least to greatest: 6/24, 9/24, 14/24, 20/24
In the survey 136 out of 160 depends on modular learning what percent of the reponents prefer modular learning?
A. 15%
B. 24%
C. 85%
D. 296%
Answers
Set up the proportions
136/160 = ?/100
Then cross multiply.
100 x 136 = 13600
13600/160 = 85
Also you could use process of elimination. 296% wouldn’t work because that’s saying 136 is almost 3 times as many as 160. The other answers wouldn’t work because it’s clear that 136 is more than half of 160.
Find the missing length.
Answers
Hope this helps
Someone Please Help I Need the awnser
Answers
Answer:
x=53
Step-by-step explanation:
2x-24=82(alt.ext.∠)
2x=106
x=53
The table gives the number of branches on a large tree after the year 2000. Which kind of function best models this relationship?
Answers
Answer: Exponential
Step-by-step explanation:
Answer:
answer with proof lol
Step-by-step explanation:
Ryan made a $3180 down payment on a car. The total cost of the car was $7500. He made 36 equal monthly payments to pay the car in full. How much did Ryan pay per month?
Answers
My 11 year old sister needs help.
Answers
Answer:
1¼ pounds
or 1.25 pounds
Step-by-step explanation:
The lightest bunch = ⅛*5 = ⅝
The heaviest bunch = 1(⅛*+7) = 1⁷/8
Find the difference between the heaviest and the lightest bunch
1⅞ - ⅝
= 15/8 - 5/8
= (15 - 5)/8
= 10/8
= 5/4
= 1¼ pounds
or 1.25 pounds
The latest online craze is a new game, Khan on Seven. You get 100 points for playing the game. In addition, you
get 50 points for each seven-letter word you make with the ten letters you receive. Sal wants to break the
record, and he needs 18,000 or more points to do so.
Write an inequality to determine the number of seven-letter words, w, Sal could make to break the record.
Graph the solution set to this inequality.
+
352
350
354
356
358
360
362
364
Switch direction
Make circle open
Answers
He needs 18,000 points.
He starts with 100, so subtract the 100 from 18,000 to get how many more points he needs:
18000 - 100 = 17,900 more points.
Divide the points needed by points per word:
17,900 / 50 = 358
He needs at least 358 words.
The inequality would be 50x+100>=18000, where x is the number of words.
Because 358 can be part of the solution, a solid dot on 358 and the line/arrow needs to point to the right for greater than.
please help aaa last Q cries
Answers
Answer:
C
Step-by-step explanation:
Hope it helps!
Answer:
Answer C is correct
Step-by-step explanation:
The left side equals 1/25, but the righ side is 625
(I usually give a better explanation, but i'm in a bit of a rush. sorry!)
what is the value of 4 in 204?
Answers
Step-by-step explanation:
its on one's place
204 = 2× 100 + 4× 1
4 = 4 × 1
Anybody know how to do this??
Answers
Answer:
Second option: x= (23.5)(1.18)
Step-by-step explanation:
It has the total and the 1 for the tip to include the original price.
Answer:
option 2:- x= (23.5)(1.18)
Step-by-step explanation:
it includes the whole amount plus the tip to be paid after dinner..
someone help me with number 8
Answers
Answer:
The answers are...:
The common ratio is -3
the sequence of the function is 2,-6, 18, -54, 162
and
the sequence of the function model is geometric
I hope this helps ^^"
Step-by-step explanation:
the common ratio is just from the -3 itself
the sequence model is just plugging n for every term so
a(1) would equal to 2, a(2)=-6 , a(3) would equal to -18, etc
and the geometric is bc it has the exponential that has (n-1), thus it is a geometric sequence
What is
12% of £1260
Answers
Answer:
£151.2
Step-by-step explanation:
12% of £1260
= 0.12 (1260)
= 151.2
The two triangles below are similar. What
is the perimeter of triangle XYZ?
Answers
Answer:
24
Step-by-step explanation:
6 ÷ 15 = 0.4
X to Y = 20 × 0.4 = 8
Y to Z = 25 × 0.4 = 10
Perimeter: a + b + c
6 + 8 + 10 = 24
Even I am surprised by what I wrote. Hopefully, it is right and helps you ^-^ Please comment if you have any questions.
(a) At Smith's Bike Rentals, it costs $18 to rent a bike for 4 hours.
How many dollars does it cost per hour of bike use?
Answers
Answer:My answer is $4.50 a hr. If u add 4.50 up 4 times, you will get 18. If u multiply 4.50 ×4 it will equal 18.
Step-by-step explanation:
Sylvia has $30 to spend on three gifts she spent 11 9/10 the dollars on gift a and 4 3/5 dollars on gift b how much money does she have left for gift c
Answers
Answer:
$13.50
Step-by-step explanation:
30 - (11.90 + 4.60) = 30 - 16.50 = 13.50
How do I do simple fractions
Answers
Answer:
i forgot just look it up that is what i do sometimes i look up videos
Step-by-step explanation:
−3xy ^5 (8y) Simplified
Answers
Helpppppppp me with question 2 Tuesday pleaseeeeee
Answers
Answer:
firstly we solve mixed fraction i. e .
5/2 +b = 47/4
b. = 47/4 - 5/2
b = 27/4
https://youtu.be/RTFkRTT0EUY
pls subscribe my channel
Answer:
2 - [tex]b = 9\frac{1}{4}[/tex]
Step-by-step explanation:
Convert the mixed numbers into improper fractions.
2 • 2 + 1 = 5
4 • 11 + 3 = 47
[tex]\frac{5}{2} + b = \frac{47}{4}[/tex]
[tex]-\frac{5}{2} +\frac{5}{2} + b = \frac{47}{4} - \frac{5}{2}[/tex]
[tex]b = \frac{37}{4}[/tex]
[tex]b = 9\frac{1}{4}[/tex]
Medians and IQRs. For each part, compare distributions (1) and (2) based on their medians and IQRs. You do not need to calculate these statistics; simply state how the medians and IQRs compare. Make sure to explain your reasoning. (a) (1) 3, 5, 6, 7, 9 (2) 3, 5, 6, 7, 20 (b) (1) 3, 5, 6, 7, 9 (2) 3, 5, 7, 8, 9 (c) (1) 1, 2, 3, 4, 5 (2) 6, 7, 8, 9, 10 (d) (1) 0, 10, 50, 60, 100 (2) 0, 100, 500, 600, 1000
Answers
For each part, compare distributions (1) and (2) based on their medians and IQRs. The reasoning is explained is given.
What is median?The median is the value that splits the mathematical numbers or expressions in the half. The median value is the middle number of data point. To find the median, firstly arrange the data points in ascending order.
The middle number in the distribution of the provided data is known as the median. The range of values in the center of the scores is known as the interquartile range, or IQR.
(a). (1) 3, 5, 6, 7, 9 (2) 3, 5, 6, 7, 20
Since all the values are identical except the highest, the distributions' median and IQR will be equal.
(b). (1) 3, 5, 6, 7, 9 (2) 3, 5, 7, 8, 9
The median is higher for the second distribution because in the case of (2) the middle number is larger.
Since the final few digits in the second distribution are higher, the IQR would be wider for the second distribution, resulting in a greater third quartile for the second distribution than the first distribution.
(c). (1) 1, 2, 3, 4, 5 (2) 6, 7, 8, 9, 10
Given that every number in the second distribution is greater than every other number in the first distribution, the median of the second distribution is higher than that of the first distribution.
Since there are the same number of items in both distributions and each number in both distributions is 1 larger than the preceding number, the IQR of both distributions would be identical.
(d). (1) 0, 10, 50, 60, 100 (2) 0, 100, 500, 600, 1000
Since all the values in the second distribution are higher than those in the first in this situation, the second distribution will have a higher median. Given that the spread of the numbers is wider in the second distribution than it is in the first, the second distribution will likewise have a higher IQR.
Therefore, the reasoning is explained.
To learn more about the median;
https://brainly.com/question/28060453
#SPJ2
7. Last school year, there were 520 learners in Mangga Elementary School 1. If 85% of these
learners were enrolled online this school year, how many learners were enrolled online?
A. 78
B. 435
C. 442
D. 605
Answers
Answer:
442
Step-by-step explanation:
100%-> 520
85%-> 442