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Mr. Chen gave a history test to his class. The scores are shown below. 75 62 68 81 55 92 58 88 72 82 48 93 81 85 77 He plotted the scores as a histogram. Which histogram correctly displays the distribution of scores?
A quadrilateral is _____ a trapezoid. (Always, sometimes, never)
Answer:
sometimes
Step-by-step explanation:
Answer:
sometimes
hope it helps.
what is x+19=21 jsjwidhsnwnd
Answer:
x=2
Step-by-step explanation:
x+19=21
subtract 19 so x can be by itself, move it to the 21 side
and subtract21-19=2
Answer:
You solve. for X. The photo is the work and answer
Ben in n years old chloe is twice as old as Ben Dan is 5 years younger than Ben
The total of bens age, chloes age, and Dan’s age is T years
Find a formula for T in terms of n
Answer:
T = 4n - 5
Step-by-step explanation:
Ben = n
Chloe = 2n
Dan = n - 5
n + 2n + (n - 5) = T years
3n + n - 5 = T years
4n - 5 = T years
For the following right triangle, find the side length x. Round your answer to the nearest hundredth.
10
14
Answer: [tex]\sqrt{96}[/tex] or [tex]4\sqrt{6}[/tex], if you want the decimal form then its 9.79.
Step-by-step explanation:
14²-10²=96
[tex]\sqrt{96}[/tex] or [tex]4\sqrt{6}[/tex], if you want the decimal form then its 9.79.
X is inversely proportional to y, and x = 18 when y = 4. find x when y is 30
Answer:
X= 2.4
Step-by-step explanation:
x = k/y............eqn1
18= k/4
k= 18×4
k= 72
Using the first equation
x= 72/30
x= 2.4
Oil is pumped continuously from a well at a rate proportional to the amount of oil left in the well. Initially there were million barrels of oil in the well; six years later barrels remain.At what rate was the amount of oil in the well decreasing when there were barrels remaining
Answer:
The amount of oil was decreasing at 69300 barrels, yearly
Step-by-step explanation:
Given
[tex]Initial =1\ million[/tex]
[tex]6\ years\ later = 500,000[/tex]
Required
At what rate did oil decrease when 600000 barrels remain
To do this, we make use of the following notations
t = Time
A = Amount left in the well
So:
[tex]\frac{dA}{dt} = kA[/tex]
Where k represents the constant of proportionality
[tex]\frac{dA}{dt} = kA[/tex]
Multiply both sides by dt/A
[tex]\frac{dA}{dt} * \frac{dt}{A} = kA * \frac{dt}{A}[/tex]
[tex]\frac{dA}{A} = k\ dt[/tex]
Integrate both sides
[tex]\int\ {\frac{dA}{A} = \int\ {k\ dt}[/tex]
[tex]ln\ A = kt + lnC[/tex]
Make A, the subject
[tex]A = Ce^{kt}[/tex]
[tex]t = 0\ when\ A =1\ million[/tex] i.e. At initial
So, we have:
[tex]A = Ce^{kt}[/tex]
[tex]1000000 = Ce^{k*0}[/tex]
[tex]1000000 = Ce^{0}[/tex]
[tex]1000000 = C*1[/tex]
[tex]1000000 = C[/tex]
[tex]C =1000000[/tex]
Substitute [tex]C =1000000[/tex] in [tex]A = Ce^{kt}[/tex]
[tex]A = 1000000e^{kt}[/tex]
To solve for k;
[tex]6\ years\ later = 500,000[/tex]
i.e.
[tex]t = 6\ A = 500000[/tex]
So:
[tex]500000= 1000000e^{k*6}[/tex]
Divide both sides by 1000000
[tex]0.5= e^{k*6}[/tex]
Take natural logarithm (ln) of both sides
[tex]ln(0.5) = ln(e^{k*6})[/tex]
[tex]ln(0.5) = k*6[/tex]
Solve for k
[tex]k = \frac{ln(0.5)}{6}[/tex]
[tex]k = \frac{-0.693}{6}[/tex]
[tex]k = -0.1155[/tex]
Recall that:
[tex]\frac{dA}{dt} = kA[/tex]
Where
[tex]\frac{dA}{dt}[/tex] = Rate
So, when
[tex]A = 600000[/tex]
The rate is:
[tex]\frac{dA}{dt} = -0.1155 * 600000[/tex]
[tex]\frac{dA}{dt} = -69300[/tex]
Hence, the amount of oil was decreasing at 69300 barrels, yearly
What is the value of a+ by when a= 7, b= and c= 1/2 ?
Answer:
a = 7
b =?
c = 1/2
a + by = 0
7 + b × 1/2 = 0
7 + 1/2 b = 0
1/2 b = - 7
b = -7 × 2
b = - 14
a + by
= 7 + - 14 × 1/2
= 7 -14/2
= 7 - 7
= 0
Step-by-step explanation:
Id.k if you forgot to write the value of b or not, since the value of b is not given, this will be ur answer.
Find the value of x!!!!
Answer:
8.54860557602668
Step-by-step explanation:
There is an ad for 1/4 off your entire purchase when you buy a tablet. You buy 3
books for a total cost of $97. The cost for the tablet is $137. Taking the discount into consideration, how much will the purchase cost you?
Answer:
The Total is $58.50
Step-by-step explanation:
Add 97 plus 137 to get 234. 1/4 as a percent is 25%. 25% of $234 is $58.50.
Hope this helps! Pls mark brainliest!
-3/16,7/4, -3/8 in order least to greatest
Answer:
-3/8, -3/16, 7/4
Put these in order starting from the smallest
5^2 2^4 3^3 1^8 SOMEONE HELP PLEASE!
Answer:
1⁸,2⁴,5²,3³
Step-by-step explanation:
so its 1,16,25,27
Soo like?! How is it not 13?! What’s the answer?!
Answer:
12
Step-by-step explanation:
Have a Nice Day :)
Kathryn and three of her friends went out to eat. They decided to split the bill evenly. If each person paid $13 which equation will
tell you the total amount of the bill?
A.13x = 4
B.4x =13
C.4 + x=13
D.x/4 = 13
Answer:
D
Step-by-step explanation:
D. x/4 = 13
I think that is the answer
what is 1236 to the 15th power
Answer:
2.4003638e + 46
Step-by-step explanation:
Answer:
2.40036376e46
Step-by-step explanation:
Question 2 Multiple Choice Worth 2 points)
(03.02)
Which of the following is a zero for the function f(x) = (x - 15)(x + 1)(x - 10)?
Answer:
The zeros of the function are: -1,10,15
Step-by-step explanation:
f(x) = (x - 15)(x + 1)(x - 10)
We can use the zero product property
0 = (x - 15)(x + 1)(x - 10)
x-15 =0 x+1 =0 x-10 =0
x=15 x = -1 x= 10
The zeros of the function are: -1,10,15
Answer:
Step-by-step explanation:
i have no clue
Dorothy Little purchased a mailing list of 2,000 names and addresses for her mail order business, but after scanning the list she doubts the authenticity of the list. She randomly selects five names from the list for validation. If 40% of the names on the list are non-authentic, and x is the number on non-authentic names in her sample, the expected (average) value of x is ______________.
a) 2.50
b) 2.00
c) 1.50
d) 1.25
e) 1.35
Answer:
b) 2.00
Step-by-step explanation:
For each name, there are only two possible outcomes. Either it is authentic, or it is not. The probability of a name being authentic is independent of any other name. This means that we use the binomial probability distribution to solve this question.
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability.
The expected value of the binomial distribution is:
[tex]E(X) = np[/tex]
She randomly selects five names from the list for validation.
This means that [tex]n = 5[/tex]
40% of the names on the list are non-authentic
This means that [tex]p = 0.4[/tex]
The expected (average) value of x is
[tex]E(X) = np = 5*0.4 = 2[/tex]
The correct answer is given by option B.
Reed has an aquarium that holds 12 gallons of
water. There are approximately 4 liters in one
gallon. Which measurement is closest to the
number of liters in Reed's aquarium?
Answer:
48
Step-by-step explanation:
12*4=48
Which situations are BEST modeled by a linear function? es A) A monthly gym membership fee. B) The cost of milk by the gallon. 0) The price of pears by the pound D) The interest rate on a car lone. E) The half-life of a radiative material.
Answer:
B) The cost of milk by the gallon.
C) The price of pears by the pound.
Step-by-step explanation:
A linear function is one that both the dependent and independent variables increases or decreases proportionally.
Thus from the given options:
i. If the gallons of milk increase, then the cost of milk also would increase proportionally. A decrease in the gallons of milk would also reduce the cost of milk.
ii. An increase in the pounds of the pearls would cause an increase in the price of the pearls. Also, a decrease in the pounds of pearls would reduce the price of the pearls.
Thus, the answers to the question are options B and C.
Answer:
The other guy is correct however he missed one
The Answer is actually A, B, C
Step-by-step explanation:
I took the test on Usa test prep.
If y varies inversely with x
and y is 10 when x is 5,
then what is y when x is 2?
Answer: X = 2 so Y=25, hope this helped!!
Step-by-step explanation:
2. The population of prairie dogs living in a nearby field has
been increasing rapidly. A wildlife expert counted 6 prairie
dogs four years ago, 24 prairie dogs two years ago, and 96
prairie dogs this year. At this rate, how many prairie dog will
he expect to see when she returns in two more years?
F. 384
G. 192
H. 120
J. 9,216
Answer: F. 384
Step-by-step explanation: Quadruples every 2 years, 6x4=24x4=96x4=384
Answer:
F
Step-by-step explanation:
It is multiplying by 4
6x4=24
24x4=96
96x4=384.
If monkey have 1 bananana and gorilla takes 1 bananana from monkey how many monkey have left
Answer:
0
Step-by-step explanation:
monkey no banana :(
Answer:
OooooOooOOOOOo AAAaaaaaaaAAA AAOOOOAAAoooooA
Translation: Monkey have no banana :(
Step-by-step explanation:
Monkey want brainliest too!
Can somebody help me?
Answer:I cannot see photo
Find the volume of a box that is 2in x 4in x 3in
Answer:
fhshegshffdfsfjdegddfhgfedhdrgdddetfrdesjdhgdhdjdjdhdhdjdjejdhdhdjdjhhgwhejdjdhdsewwhehsjrhdgddjdjfhwhdddfjfhshdjjhdhdjdjffjdjshwghhjrjehwhhejjfjfjejehekwkjjhfkwkejhsekskwjdjfjjt
Step-by-step explanation:
fhjjhcnncxfgnnng
How would the expression x-9 be rewritten using Difference of Squares?
Answer:
Step-by-step explanation:
(x+3)(x-3)
x squared and -9 are both square numbers.
the square root of x^2 is x
the square root of -9 is 3. so you just need to write (x+3)(x-3)
you can check by expanding the brackets and the middle x terms should cancel out
Find the area of the shape shown below.
PLEASE HELP!!! :(
Answer:
21
Step-by-step explanation:
Answer:
21
Step-by-step explanation:
ik im a bit late but i was gonna say 21 too
EASY 7TH GRADE MATH, WILL GET BRAINLIEST.. AGAIN
Answer:
B. 1/3
Step-by-step explanation:
If we take the fist two boxes on top of the grid, we can divide 7 1/2 by 2 1/2 to find the ratio. In this case, the ratio is 3, meaning that for every cup of sugar their is 3 cups of flour. This means that 1 cup of flour would equal 1/3 cups of sugar.
4x+3y=10 and -6x-5y=-16
Answer:
Okay, Tell em what ur trying to ask please :/- confused
Step-by-step explanation:
2/3 (x-6) = 6
Pls I need help
Answer:
x=15
Step-by-step explanation:
Answer:
x = 15Explanation:
2/3 (x-6) = 6
2x/3 - 12/3 = 6
(2x-12)/3 = 6
2x-12 = 18
2x = 18+12
2x = 30
x = 15
how do I solve pic rel? Online calculators keep saying the result is -1 but they don't show any steps which is confusing
thx in advance!
Answer:
-1
Step-by-step explanation:
[tex] \sqrt{9 - 4 \sqrt{2} } - 2 \sqrt{2} \\ \\ = \sqrt{8 + 1 - 4 \sqrt{2} } - 2 \sqrt{2} \\ \\ = \sqrt{8 - 4 \sqrt{2} + 1} - 2 \sqrt{2} \\ \\ = \sqrt{ {(2 \sqrt{2}) }^{2} - 2 \times 2 \sqrt{2} \times 1 + {1}^{2} } - 2 \sqrt{2} \\ \\ = \sqrt{( {2 \sqrt{2} - 1)}^{2} } - 2 \sqrt{2} \\ \\ (2 \sqrt{2} - 1) - 2 \sqrt{2} \\ \\ = 2 \sqrt{2} - 1 - 2 \sqrt{2} \\ \\ = - 1[/tex]