Answer:
-18
Step-by-step explanation:
2x²-7xy+3y²
2(3²)-7(3)(4)+3(4²)
2(9)-84+3(16)
18-84+48
18+48-84
-18
Kailynn observed a SpaceX rocket on the launch pad in Cape Canaveral, Florida. The rocket is 230 feet tall, and Kailynn measures the angle of elevation between the base and the top of the rocket to be 5 degrees. How far is she from the base of the rocket?
A-2629feet
B-2639feet
C-20feet
D-231feet
And explain
Answer:
i think B
Step-by-step explanation:
what is the value when x = 2?
i need this asap!
Answer:
y=6!
Step-by-step explanation:
you can easily see it on the graph. on the x axis, 2 is equivalent to 6
Answer:
When x is 2 y equals 6.
Step-by-step explanation:
You go right on the graph two units then go up the y axis till the line intersects the lines. In this case the graphed point is (2,6)
Benson played for 10 minutes after reaching home. He watched television for another 20 minutes before eating his lunch. His lunch, which lasted 20 minutes, was finished at 2:50pm. At what time did Benson reach home?
Answer:
At 2:00.
Step-by-step explanation:
You take 10 minutes off 2:50 for play time add the two 20s together then subtract 40 to get 2:00.
11. Twelve samples of water form a particular source have an average lead concentration of 12.5µg/L with a standard deviation of 2.0µg/L. 1 (a) Find a 95% confidence interval for the lead concentration in water from this source. (b) Can you conclude that the lead concentration is less than 14µg/L?
Answer:
a) The 95% confidence interval for the lead concentration in water from this source is between 11.23 µg/L and 13.77 µg/L.
b) The upper bound of the confidence interval is less than 14 µg/L, which means that yes, we can conclude that the lead concentration is less than 14µg/L.
Step-by-step explanation:
We have the standard deviation for the samples, which mean that the t-distribution will be used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 12 - 1 = 11
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 11 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.95}{2} = 0.975[/tex]. So we have T = 2.201
The margin of error is:
[tex]M = T\frac{s}{\sqrt{n}} = 2.201\frac{2}{\sqrt{12}} = 1.27[/tex]
In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 12.5 - 1.27 = 11.23 µg/L.
The upper end of the interval is the sample mean added to M. So it is 12.5 + 1.27 = 13.77 µg/L.
The 95% confidence interval for the lead concentration in water from this source is between 11.23 µg/L and 13.77 µg/L.
(b) Can you conclude that the lead concentration is less than 14µg/L?
The upper bound of the confidence interval is less than 14 µg/L, which means that yes, we can conclude that the lead concentration is less than 14µg/L.
Multiply (6+3i)(3+i)
Help help help help help help
Step-by-step explanation:
Area of triangle = 1/2×base×height
= 1/2×32×18
= 288in²
Find the area of the following composite figure
Answer:
1713
Step-by-step explanation:
952+288+472=1713
4. What is the measure of each interior angle of
a regular 20-gon?
Answer:
162
Step-by-step explanation:
twice the difference of v and z
Answer:
me
Step-by-step explanation:
becaus im the bes guy
Aidans hourly salary is $11. If Aidan normally works a 40 hour week , then how much is normally earned in a week?
Answer:
$440
Step-by-step explanation:
40x11=440
hope it helped
plz mark me as brainliest.
Can someone please help me figure out the costing for the serving on this recipe.
Steps on how is on: wikihow.com/cost-a-recipe
Kriti has 20 coins that make up a total of 41 in the denomination of 1-rupee, 2-rupee, and 5-rupee coins.
The number of 2-rupee coins are three times the number of 5-rupee coins.
Answer:
8
Step-by-step explanation:
Let us assume the following things
x be no of 5 rupees coins
y be no of 2 rupees coins
z be no of 1 rupees coins
Now accoridng to the question
5x + 2y + z = 41
x + y + z = 20
y = 3x
Now do the elimination of variables
So,
4x + y = 21
7x= 21
x = 3
y = 9
z= 8
hence, the 1-rupee coin would be 8
please help its hard ty
Answer:
This is actually easy.
You need to multiply the term outside the bracket with the ones in the bracket (I hope I make sense lol)
Answer is 50 + 10n
Responda: Por favor, é urgente.
Answer:
C) CA=40
Step-by-step explanation:
2y/(2y+4)=(2y+6)/4y
cross multiply
8y²=4y²+20y+24
4(2y²)=4(y²+5y+6)
divide both sides by 4
2y²=y²+5y+6
y²-5y-6=0
(y-6)(y+1)=0
So the answer must be either 6 or -1. Since it can't be a negative number, it must be 6.
CA=2(6)+4+4(6)
CA=12+4+24
CA=40
Question 20 A retired couple invested $6000 in bonds. At the end of one year, they received an interest payment of $402. What was the simple interest rate of the bonds?
Answer: interest rate was 6.7 %
Step-by-step explanation: 402/6000 = 0.067 = 6.7%
The cheerleaders are making a banner that is 8 feet wide the length of the banner is 1 1/3 times the width of the banner how long is the banner
Answer:10 2/3 feet
Step-by-step explanation: 8 times 4/3= 32/3=10 2/3 feet
Find the annual percentage yield of a saving account that pays 2.75% compounded quarterly
Answer:
The annual percentage yield is of 2.78%.
Step-by-step explanation:
Annual percentage yield of an account:
The annual percentage yield of an account compounded n times during the year with a decimal interest rate of r is given by:
[tex]Y = (1+\frac{r}{n})^n - 1[/tex]
Pays 2.75% compounded quarterly
This means that [tex]r = 0.0275, n = 4[/tex]. So
[tex]Y = (1+\frac{r}{n})^n - 1[/tex]
[tex]Y = (1+\frac{0.0275}{4})^4 - 1[/tex]
[tex]Y = 0.0278[/tex]
0.0278 = 2.78%
The annual percentage yield is of 2.78%.
If 10 is p percent of 21 , p is a number between
Answer: 47 and 48
Step-by-step explanation: 10/21 ≈0.476190476 and multiplied by a 100 to get a percentage is ≈ 47.6 which is in between 47 and 48. Hope this helps, and have a great day!
Answer: 47%
Step-by-step explanation:
half of 20 is 10 so half of 21 is 10.5
Hi can someone please help me with this question I've been stuck on it for soooo long!!
Answer:
Let x=sinθ
2sin²θ = 5sinθ - 3
2x²=5x-3
2x²-5x+3=0
(2x-3)(x-1)=0
2x-3=0 or x-1=0
x=3/2 or x=1
sinθ=2/3 or sinθ=1
θ=arcsin(2/3) or θ=arcsin(1)
θ=0.729727656 or θ=1.57079633=π/2
x = _
•2
•6
•3.75
Thank you!
Answer:
so is the value of six times 1
Step-by-step explanation:
..Find the missing number?
Answer:
The missing number would be 17
Step-by-step explanation:
Answer: I think it’s 7
Step-by-step explanation:
PLEASE ANSWER THE QUESTION IN THE PICTURE BELOW
sorry if the pic is blurry if u can't tell what it says in the middle (where the line is) it says 4in and all the other numbers say 6in (there is 3 of them)
9514 1404 393
Answer:
12 square inches
Step-by-step explanation:
The area is given by the formula ...
A = 1/2bh
Here, the base is 6 inches and the height is given as 4 inches. Then the area is ...
A = (1/2)(6 in)(4 in) = 12 in²
The area of the triangle is 12 square inches.
_____
Comment on the problem
Since you are given the base and height, we presume you are intended to use the formula above. You are also given all three side lengths. If you use the appropriate formula with those, you find the area is about 15.6 square inches. (The height of this triangle is actually closer to 5.2 inches.)
The figure represents a geometry that cannot exist. With the given base and height, the side lengths should be 5, not 6.
Please help me. There are 25 students in Mrs. Benatar‘s class at the beginning of the school year, and the average number of siblings for each student is three. A new student with eight siblings join the class in November. What is the new class average for number of siblings? Round your answer to the nearest hundredth.
Answer: 3.19
Step-by-step explanation:
So to find the average I used a simple but pretty effective method
3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3+8/26=3.1923
So the new average is 3.19
if the given expression is multiplied by 3^6, which expression is not equivalent?
Answer:
8
Step-by-step explanation:
I can't see the pic.
Matheng or anyone else I need your help
Mike, a local auto mechanic, charges a certain amount to diagnose and repair a car. He bases his price on the amount of time that it takes for the repair. Use the graph shown below to fill out the missing representations. Then, answer the questions that follow.
Can you also answer questions and 2 at the bottom.
Answer:
Okay ill do it from the ones given
Verbal Description:
Well it seems like Mike is charging a one time fee of 50 dollars each no matter what and after that its 30 dollars per hour.
Equation:
Assuming X is hours and C is total cost
50+30x= C
Table: (this will be in the order of hours, process and total)
0- (50+30*0) -0
1- (50+30*1) -80
2- (50+30*2) -110
3- (50+30*3) -140
4- (50+30*4) -170
5- (50+30*5) -200
6- (50+30*6) -230
Graph:
There are no instructions or questions for graph but if there is let me know in the comments
Questions:
#1) The rate of change for the graph is 30 dollars per hour or 30/1. Since for every hour its +30 plus the one time fee.
#2) The y-intercept here is 50 or in this case the one time payment fee.
Each figure below represents a fraction. Which figure is NOT equivalent to the others
The full question with the answer options is as follows:
Each figure below represents a fraction. Which figure is NOT equivalent to the others?
the answer options are as follows:
a. [tex]\frac{2}{3}[/tex]
b. [tex]\frac{4}{6}[/tex]
c. [tex]\frac{3}{4}[/tex]
d. [tex]\frac{8}{12}[/tex]
Answer:
The correct answer is c:
Step-by-step explanation:
To know when two or more fractions are equivalent, we must multiply the numerator of one fraction by the denominator of the other fraction, the result must be the same value.
[tex]\frac{2}{3} x \frac{4}{6}[/tex] = (2x6) =12 ; (3x4)=12
[tex]\frac{2}{3} x \frac{8}{12}[/tex] = (2x12)=24 ; (3x8) =24
[tex]\frac{4}{6} x \frac{8}{12}[/tex] = (4x12)=48; (6x8)=48
A simple closed figure bound by line segments is called polygon.
True or False?
Answer:
A. True
Step-by-step explanation:
I majored in Mathematics
Question 2
A laboratory did 36 blood tests on Monday, 43 on Tuesday,
29 on Wednesday, and 48 on Thursday. What is the mean
(average) number of blood tests the lab did each day?
answer choices :
o 45
o 42
o 39
0 33
Answer:
The answer is 39.
Step-by-step explanation:
The average is the total amount of blood tests divided by the number of days.
Total: 36 + 43 + 29 + 48 = 156 blood tests / 4 days = 39 blood tests per day.
help me pls i am confused lol
Answer:
[tex]cotθ = \frac{7 \sqrt{51} }{51} [/tex]
[tex]sinθ = \frac{ \sqrt{51} }{10} [/tex]
[tex]cscθ = \frac{10 \sqrt{51} }{51} [/tex]
Step-by-step explanation:
Please see the attached picture for the full solution.
Please help me with this (if y’all give me some bs link I’ll report :)) pls and thank you kindly
Answer:
a=8 b=3/2
Step-by-step explanation:
so here a is the initial value which 8
then we can plug in 2 for x and 18 for f(x) to find b
f(x)=8*b^x
18=8*b^2
18/8=b^2
9/4=b^2
b^2=(3/2)^2
b=3/2