please, please, please, help me. this is 100 points. I only have 20 more minutes, if you could help that'd be amazing. Im running out of time and am really stressed. Attached is my question.
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Answer:
Step-by-step explanation:
If you complete the square and double the time to get back to the surface you will have your answer.
d = 2(t^2 - 4t) - 10; Take 1/2 of - 4 and square it. Add the result inside the brackets.
d = 2(t^2 - 4t + (4/2)^2 ) - 10
d = 2*(t^2 - 4t + 4) - 10 - 2*4
Did you notice I put the 2*4 outside the brackets and turned it into a minus. The reason that happened is to offset what is inside the brackets that was added here.
d = 2(x - 2)^2 - 18; t^2 - 4t + 4 is a perfect square. that 2 inside the brackets is critically important.
The 18 is the maximum depth below the surface of the water. (Poor choice of words. Technically - 18 is a minimum). But you want to use t - 2 to make it into 0. t - 2 = 0 ; t =2
What that means is that it took 2 minutes to get 18 meters below the surface of the water. He will break the surface of the water 2 minutes later. I don't exactly know how to answer the question. It is 2 minutes to get from the minimum depth to the surface. It is 4 minutes to get to the surface when he begins his dive.
Come back to the surface means d=0
2t²-8t-10=02t²-10t+2t-10=02t(t-5)+2(t-5)=0(2t+2)(t-5)=0t=-1 and t=5Take positive
t=5s
Related Questions
A 1/3
B 1/2
C 2
D 3
will give brainliesttt
Answers
Explanation:
standard form. х + 9 х + 3
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Answer:
10x+3, or 2x+12, or [tex]x^{2}[/tex]+12x+27
Step-by-step explanation:
If the equation is x + 9x + 3, combine like terms you get 10x+3
If the equation is x+9 + x+3, combine x and numbers (like terms) and you get 2x+12
If the equation is (x+9)(x+3) or it is asking you to multiply, multiply x by x, and 9 by x, and 3 by x, and 9 by 3. Add them all up (like terms) and you get [tex]x^{2}[/tex]+12x+27.
Let me know which one you meant, and if its correct and have a great day! Please give brainliest if you can.
{1800*(-90)} /495/(-22)
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1736910
HELP PLEASE
(Look at the picture)
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Answer:
??????idcccc
Step-by-step explanation:
when you know someone and like person he or she is considered a peer true or false
Answers
Answer:
yes it is true
Step-by-step explanation:
Answer: False
explanation: :)
Need help on this please
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y-(-4)=-(x-0)
y+4=-x
y=-x-4
Hope it helps
Are the two triangles similar? If yes, write a similarity statement and explain how you know they are similar.
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Answer:
c
Step-by-step explanation:
Yes the two triangles are Similar by AA Similarity Criteria.
What is Similarity?If the ratio of one triangle's two sides to another triangle's two sides is the same and both triangles' two sides inscribe the same angle, then
two triangles are said to be similar.
Given:
In ΔAOR and ΔEOD
<AOR = <DOE = 40 (verticals opposite angle)
Now, In ΔEOD
<DEO = 180 - (40+ 35)= 180- 75= 105
and, <ARO = <DEO = 105
So, by AA Similarity Criteria ΔAOR and ΔEOD are similar.
Learn more about Similarity here:
https://brainly.com/question/26451866
#SPJ2
The figure is made up of a cone and a cylinder
To the nearest whole number, what is the volume of this figure?
Use 3.14 to approximate pie ,Round only your final answer to the nearest whole number.
Enter your exact answer in the box
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Answer:
personally I think the answer is 50.27
Question: what is the y-intercept
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Answer:
(0,6)
Step-by-step explanation:
It is the only one that has both numbers that line up with each other.
I need to know this now please it’s due tomorrow-
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Answer:
i only know a few
Step-by-step explanation:
5. 60
6. 80
4. 58
3. 38
Someone please help me answer this!!!
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Answer:
I believe it's...
4.32 × 10^5
Sorry if it's wrong
Please help me please
Answers
Answer:
3) [tex]x^{2}[/tex] + 4x - 21
Step-by-step explanation:
(x - 3)(x + 7)
Distribute:
x(x + 7)
-3(x + 7)
x(x) = [tex]x^{2}[/tex]
x(7) = 7x
-3(x) = -3x
-3(7) = -21
Combine like terms:
7x - 3x = 4x
Put it together:
[tex]x^{2}[/tex] + 4x - 21
Answer: x²+ 4x - 21
Let's do this step-by-step.
1. Apply the foil method. (formula: (a + b)(c + d) = ac + ad + bc + bd)
F - First
O - Outer
I - Inner
L - Last
= xx + x × 7 + (-3)x + (-3) × 7
2. Apply the minus and plus rules. + (-a) = -a
xx + 7x - 3x - 3 × 7
3. Simplify.
Convert xx into a exponent.xx ⇒ x²Subtract 7 by 3.7x - 3x = 4xMultiply 3 by 7.7 × 3 = 21Hence, the answer is x² + 4x - 21
Let me know if you have any questions.
~ Lily, from Brainly.
What is f(6)?
f(x) = 5x - 2
Answers
Answer:
f(6) = 28
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightAlgebra I
FunctionsFunction NotationStep-by-step explanation:
Step 1: Define
f(x) = 5x - 2
f(6) is x = 6
Step 2: Evaluate
Substitute in x [Function]: f(6) = 5(6) - 2Multiplication: f(6) = 30 - 2Subtraction: f(6) = 28=========================================================
Explanation:
Everywhere you see an x, replace it with 6
f(x) = 5x - 2
f(6) = 5*6 - 2
f(6) = 30 - 2
f(6) = 28
Remember that 5x is the same as 5*x or "5 times x". So that's why 5x turned into 5*6 after replacing x with 6. After every x is replaced, you follow the order of operations PEMDAS to simplify.
PLEASE ANSWER THE PIC BELOW
Answers
Answer:
Steel
Step-by-step explanation:
It’s an obvious answer Bc it shows it on the number line
Answer:
it's steel
Step-by-step explanation:
Bc bro it's on the number line like the guy said above me and will you plz give me brainliest in need it bad so i can get to a new rank
Kenji has 54 books, 17 of the books are mysteries. 22 of the books are adventure stories. The rest of the books are about animals. How many of the books are about animals?
Answers
Angelo is 7 years younger than his brother Jayson. If Jayson's age is J, what expression stand's for Angelo's age?
Answers
Answer: j-7
Step-by-step explanation:
So Jayson is J
Angelo is 7 years younger than him so j-7
use zero product property to solve (4x+5)(x+7)=0
Answers
Answer:
x = -5/4, x= -7
Step-by-step explanation:
Using the zero product property to solve this equation,
4x+5 = 0
4x = -5
4x/4 = -5/4
x = -5/4
x+7 = 0
x = -7
find the unit price of a 3-pack of bottled juice for$6.75. how much does 1 bottle cost.
Answers
Answer:
the answer is 2.25
Step-by-step explanation:
you divide 6.75÷ 3
Answer:
$2.25
Step-by-step explanation:
$6.75÷3
=$2.25
hereeeeee
A triangle has lengths of 12 cm, 14 cm, and 18 cm. What is the perimeter of the triangle in inches? ( 1 cm = 0.4 in.)
Answers
Answer:
15.8 in
Step-by-step explanation:
12cm x .4 = 3 in
14 x .4 = 5.6
18 x .4 = 7.2
3 + 5.6 + 7.2 = 15.8 in
Hope that helps!
-Sabrina
What is this help me please
Answers
Answer:
I think it's D
Step-by-step explanation:
I think it's D
2/7 ÷ 3/4 - 2/7 =
It has to be a fraction. Please answer quick! :(
Brainliest and 30 points.
Answers
Step-by-step explanation:
2 3 2
----- ÷ ----- - -----
7 4 7.
8 2
----- - -------
21 7
8×1-2×3
------------------
21
8-6
-------
21
2
-----
21
I think it will be helpful for you
Answer:
2/21
Step-by-step explanation:
[tex]\frac{2}{7} : \frac{3}{4} - \frac{2}{7} = \frac{2}{7} * \frac{4}{3} - \frac{2}{7} = \frac{8}{21} - \frac{6}{21} = \frac{2}{21}[/tex]
What are the slope and y-intercept of the line?
A scatterplot with about 20 points plotted in an upward trend along with a line of best fit that begins at the point zero comma 2 and passes through the point 4 comma 7 point 2.
The slope is approximately 3 and the y-intercept is 2.
The slope is approximately 1.33 and the y-intercept is 2.
The slope is approximately 2 and the y-intercept is 3.
The slope is approximately 2 and the y-intercept is 1.33.
Answers
Answer:
i think it would be B.The slope is approximately 1.33 and the y-intercept is 2.
it would be more clear if you put a graph :)
(paragraph) out of plato, arstotle and socrates qhich was the most profound impact on oiy society provides reasons and cite evidence.
Answers
Answer:
Step-by-step explanation:
The ancient Greek philosophers Plato and Aristotle may seem like the quintessential Dead White Males, but in fact they’re very much alive. Twenty four centuries ago they laid the foundations of Western culture, and their ideas and insights still dictate essential features of our world right now, from what we eat to what we see on the Internet
this is what I found and i know feed off of
HURRY PLEASE!! I WILL GIVE BRAINLIEST
Answers
Area is length x width, one side is 4
4 x 6 = 24
24 x 13.5 = 324
help me plz if u dont post right answer i will report
Answers
Answer: Wait so you will give me brainliest if I do this?
Step-by-step explanation: :0 mind blown if you do
Here you go brainlist
The ratio of boys to girls in a class is 5:7. There are 36 students in the
class. How many more girls than boys are there?
Answers
Answer: number of girls = 21 & number of boys = 15
21 - 15 = 6 ( the difference is 6 )
Step-by-step explanation:
Answer:
add the ratios together. this gives 5+7 which is 12. divide 36 by 12, this gives 3. this tells us it's three students for every value of the ratio, so the ratio is 5(3):7(3). it becomes 15 boys to 21 girls. to find out how many more girls, we subtract 15 from 21. our answer is 6.
Un pueblo tiene 1500 vecinos de los que 975 viven de la pesca. ¿Que tanto por ciento son pescadores?
Answers
Answer:
97.5%
Step-by-step explanation:
Espero que esto ayude, ¿de dónde eres?
mr. grover stayed on q hotel for two days. the room rent was ₹3,500 per day. he also had to pay a luxury tax of 7% on the room rent. how did he pay in all for two days?
Answers
Answer:
[tex]After\ Tax = 7490[/tex]
Step-by-step explanation:
Given
[tex]Days = 2[/tex]
[tex]Rent = 3500[/tex] daily
[tex]Tax = 7\%[/tex]
Required
The total amount paid
For a day, he pays (without tax)
[tex]Rent = 3500[/tex]
For 2 days, he pays
[tex]Rent = 3500 * 2[/tex]
[tex]Rent = 7000[/tex]
After tax, his bills is:
[tex]After\ Tax = Rent + Rent * Tax[/tex]
[tex]After\ Tax = 7000 + 7000* 7\%[/tex]
[tex]After\ Tax = 7000 + 490[/tex]
[tex]After\ Tax = 7490[/tex]
9(3+c+4) what is the answer I got 62+9c can somebody help me out?
Answers
Answer:
Hmm I got 9c+63
Step-by-step explanation:
Answer: 7c times 9
Step-by-step explanation: PEMDAS
9(3+c+4) (3+c+4)= 7c
9(7c) the parentheses means times so 9 times 7c but it in this order 9(7c) btw I’m in middle school and this is college? Easy hope I’m right.
One Classroom has a volume of 564 cubic feet. Another classroom measure 17 feet tall , 8 feet long , and 5 feet wide. How much bigger is the volume of the second classroom compared to the first ?
Answers
Answer:
Step-by-step explanation:
Let d=difference. V=xyz
d=17(8)5-564
d=680-564
d=116 ft^3
So the second classroom is 116 cubic feet larger than the first.