Pls helppp :))
Solve for x by factoring
X^2+4x-21=0
There are multiple answers
Answer:
[tex]x=3,-7[/tex]
Step-by-step explanation:
We can solve for x by using [tex]\frac{-b\pm\sqrt{b^{2} -4ac} }{2a}[/tex]
By applying this on the quadratic equation, we get:
[tex]x=\frac{-4\pm\sqrt{4^{2}+84} }{2}[/tex]
Which simplifies to:
[tex]x=\frac{-4\pm10}{2}[/tex]
[tex]\therefore x=3,-7[/tex]
When a number is subtracted from 11, the result is 6 more than the number. Find the number.
Answer:
Step-by-step explanation:
11-2.5= 8.5
8.5-2.5=6
your answer is 2.5
DO Y'ALL KNOW THE ANSWER?
Answer:
C
Step-by-step explanation:
12000 feet equals about 2 miles.
5280 is about half of 12000 so it is about 1 mile.
I need to rearrange the variables to solve for pressure, P, as a function of volume and temperature, V and T. Write out your work on paper and submit a picture.
Answer:
P = (8T) / V
Step-by-step explanation:
P*V=8*T*P/P multiply both sides by P
P*V=8*T because P/P=1
P = 8T/V divide both sides by V
If x = -2, what is the value of y, that makes the equation, y = 2x + 3, true? Explain how you know.
Answer:
Y is equals to negative 1.
Step-by-step explanation:
y = 2x + 3
y =2(-2)+ 3
y =-4+ 3
y=-1
give the value of the expression from (a) when x=10
(i just need the answer for B)
Answer:
257
General Formulas and Concepts:
Order of Operations: BPEMDAS
Step-by-step explanation:
Step 1: Define
2x² + 5x + 7
x = 10
Step 2: Evaluate
Substitute: 2(10)² + 5(10) + 7Exponents: 2(100) + 5(10) + 7Multiply: 200 + 50 + 7Add: 250 + 7Add: 257SOMEONE HELP IM STRESSING OUT
Answer: right angles x equals 7 and both m1 and 1 arre 5
Step-by-step explanation:
Answer: CA
Step-by-step explanation:
corresponding angles
90=5x
x=18
m1=90
m2=90
(04.02 MC) Are the following figures similar?
Answer:
B correct me if i am wrong!
Step-by-step explanation:
the answer is b. explanation............
Your uncle just bought a hybrid car and wants to take you and your siblings camping. Before you leave for the trip your uncle fills up the car with 18 gallons of gas. After driving for 1 hour there are 16.5 gallons of gas left in the tank.
Gribbles are small, pale white, marine worms that bore through wood. While sometimes considered a pest since they can wreck wooden docks and piers, they are now being studied to determine whether the enzyme they secrete will allow us to turn inedible wood and plant waste into biofuel.1 A sample of 50 gribbles finds an average length of 3.1 mm with a standard deviation of 0.72. Give a best estimate for the length of gribbles, a margin of error for this estimate (with 99% confidence), and a 99% confidence interval. Round your answer for the point estimate to one decimal place, and your answers for the margin of error and the confidence interval to two decimal places. point estimate = Enter your answer; point estimate margin of error = Enter your answer; margin of error The 99% confidence interval is Enter your answer; The 99%confidence interval, value 1 to Enter your answer; The 99%confidence interval, value 2
Answer:
a) The Margin of Error = 0.26
b) The 99% Confidence Interval = ( 2.84, 3.36)
Step-by-step explanation:
a) Margin of Error
The formula for Margin of Error =
z × Standard deviation/√n
From the above question
The z score for 99% confidence interval = 2.576
Standard deviation = 0.72
n = Random number of samples = 50
Margin of Error =
2.576 × 0.72/√50
= 1.85472 /√(50)
= 0.2622970178
Approximately to 2 decimal places = 0.26
b) 99% Confidence Interval
= Mean ± Margin of Error
Mean = 3.1mm
Confidence Interval = 3.1 ± 0.26
3.1 ± 0.26
= 2.84
3.1 + 0.26
= 3.36
The 99% Confidence Interval = ( 2.84, 3.36)
Ina certain county weights of women are normally distributed with a mean of 138 lb and a standard deviation of 15 lb. What percentage of women in that country weigh more than 120 lb
Answer:
88.493%
Step-by-step explanation:
We solve this question using z score formula.
Z score = x - μ/σ
where
x is the raw score = 120lb
μ is the population mean = 138lb
σ is the population standard deviation = 15lb
Hence,
z = 120 - 138/15
= -1.2
Probability value from Z-Table:
P(x<120) = 0.11507
P(x>120) = 1 - P(x<120)
1 - 0.11507
= 0.88493
Converting to percentage
= 0.88493 × 100
= 88.493%
The percentage of women in that country weigh more than 120 lb is 88.493%
find the slope: 2x-6y=8
Answer:
m = 1/3
Step-by-step explanation:
Answer:
Slope is 1/3 and y=mx+b form: y=1/3x-4/3
Step-by-step explanation:
ASAP HELP BRAINLIEST 100 POINTS PLZ PLZ PLZ HELP
Michelle is having a poster printed from a picture that is 4 inches wide by 6 inches tall. The enlarged poster is 20 inches wide and 30 inches tall. Which proportion can be used to represent the picture sizes?
StartFraction 6 over 4 EndFraction = StartFraction 20 over 30 EndFraction
StartFraction 4 over 6 EndFraction = StartFraction 20 over 30 EndFraction
StartFraction 4 over 6 EndFraction = StartFraction 30 over 20 EndFraction
StartFraction 4 over 30 EndFraction = StartFraction 6 over 20 EndFraction
Answer:
20 inches wide and 30 inches tall
Step-by-step explanation:
if the height went from 6 to 30 that means it grew by 5 so the poster would be
20 inches wide and 30 inches tall
Answer:
Start Fraction 4/6
End Fraction 20/30
PLZ HELP MEE!!!!!!!!!!
Answer:
y=7(x-5)+3
Step-by-step explanation:
Urgent!!!!! Please answer!!!!!!
Answer:
A
Step-by-step explanation:
At a baseball game, the stadium gave T-shirts to the first 100 fans to arrive. Each T-shirt cost $15.00. How much did the stadium pay for the T-shirts it gave away?
TRYING TO COMPLETE BEFORE 11:59 PLEASE HELP IM HAVING A PANIC ATTACK
Compare the slopes m1 & m2 of the lines to determine if the lines are parallel, perpendicular or neither.
Answer:
In order top to bottom: perpendicular, parallel, neither
Step-by-step explanation:
For lines to be perpendicular, their slopes must be the opposite reciprocals of each other. That means the fraction is flipped and the sign is flipped. For the first one it's 3/4 and -4/3 which is opposite reciprocals.
For lines to be parallel, the slopes are the same. The second one has both slopes = 1/2.
The last one is neither because it's not equal and they're not opposite reciprocals.
I recommend graphing these if you're still having trouble with the concept. You can try desmos.com, that's a good website to use.
ASAP
Can someone please helppp
Answer:
Option 4
Step-by-step explanation:
Would HL ASA SAS AAS or SSS be used to justify that the pair of triangle is congruent
I WILL MARK AS BRAINLIEST PLS PLS PLS HELP
Answer:
1) is height(age)
2) should be shipping(distance)
3) g(8) = 28
4) f(3) = 18
Step-by-step explanation:
plug in 8 as x. 5(8)- 12 --> 40 -12 = 28.
plug in 3 as x. 2x² --> 2(3)^2--> 2(9) = 18.
What is negative 6/11 plus negative 3/11?
Answer:
-0.81818181818
Step-by-step explanation:
Answer:
-9/11
Step-by-step explanation:
Which number of simulation trials would be likely to produce results that are
closest to the actual probability?
Answer:
It;s 30
Step-by-step explanation:
The number of simulation trials that would be likely to produce results that are closest to the actual probability is 25. The correct option is C).
The following steps can be used in order to determine the number of simulations:
Step 1 - Remember the maximum number of trials gives the maximum chance to produce results that are closest to the actual probability.
Step 2 - Now, check all the options given in the question and choose the largest one.
From the above steps, it can be concluded that the correct option is C) 25.
For more information, refer to the link given below:
https://brainly.com/question/795909
Pls, help me with this problem.
Large table: Has 10 campers eating 4 pizzas.
Small table: Has 8 campers eating 3 pizzas
The campers at each table share the pizzas equally. Which table gets more pizza per person? Please explain
PLEASEEEER HELPPP!!
If possible how would you prove that the given triangles congruent
Answer:
AAS
Step-by-step explanation:
Write 0.15 as a fraction in simplest
Answer: 3/20 also known as 15% Hope this helps Have a great night
Step-by-step explanation:
1. If 8 lbs. of onions costs $19.20, then how much will 11 lbs. of onions cost? 2. If my car travels 270 miles on 15 gallons of gas, then how many gallons of gas will be needed to travel 414 miles? 3. f 12 gallons of oil cost $34.80, how much will 7 gallons cost? 4. If a snail moves 9 inches in 5 minutes, how long will it take to move 27 inches? 5. You get paid 51.00 for 4 hours of work. How much would you get paid for 9 hours of work? PLEASE EXPLAIN HOW YOU GOT THE ANSWER. I MIGHT MARK BRAINLIEST IF RIGHT!
Answer:
1. 26.4
2. 23
3. 20.3
4. 15
5. 114.75
Step-by-step explanation:
1. 19.20/8= 2.4
2.4 *11= 26.4
2. 270/15=18
414/18=23
3. 34.80/12= 2.9
2.9*7=20.3
4. 9/5=1.8
27/1.8=15
5. 51.00/4= 12.75
12.75*9=114.75
The diagram above represents a biochemical process that occurs in a cell. The purpose of this process is to synthesize ?
Messenger RNA
Carbohydrates
Deoxyribonucleic Acids
Proteins
Answer:
Proteins
Step-by-step explanation:
I took the test and I got it right.
Answer:
proteins
Step-by-step explanation:
if 8 7/18 - ( 1 5/6 + y) = 3 4/15 + 2 3/45
what is y?
which rule describes the transformation? picture below
Answer:
Try D) rotation 180 degrees about the origin.
Step-by-step explanation:
When you look at it, it appears to move 180 degrees about that origin.
Hope this helps! Let me know!
Write the equation of a line that is
perpendicular to y = -2/3x - 4 and
passes through the point (0, 0).
Answer:
y=3/2
Step-by-step explanation:
This line's slope is perpendicular to -2/3 and its y intercept is 0.
