Why do scientists use models?
A)
Models are unreliable.
B)
Models waste natural resources.
Models predict not just describe events.
Models are based on scientific laws and principals so they are more
reliable than the real thing.
D)
Select "Growth" or "Decay" to classify each function.
Answer:
they all all right
Step-by-step explanation:
growth
decay
growth
Someone please help and please show the work too :(
The sum of two numbers is 15. Twice one number equals 3 times the other. Find the numbers
Answer:
6 and 9
Step-by-step explanation:
x + y =15
2x = 3y Set up system of equations
x = [tex]\frac{3y}{2}[/tex] Solve for x
[tex]\frac{3y}{2}[/tex] + y = 15 Substitute
3y + 2y = 30
y = 6
x = 9
The minute hand of a clock in a clock tower has a length of 36 inches.
If a butterfly landed on the extreme tip of the minute hand at exactly 12:00 noon and rode the minute hand until 12:45 p.m., how far did the butterfly ride along the arc traced by the minute hand?
45 i guessStep-by-step explanation:
Helpp!!
At Charles School, 1/5 of the 75 students in seventh grade play in the jazz band. how many seventh graders play in the jazz band?
Answer:
15
Explanation
1/5x75=75/5 =15
15 seventh graders play in the jazz band as per the given ratio.
What is the ratio?One quantity can be expressed as a fraction of other quantities using a ratio, which is a number. Only when the two numbers in a ratio have the same unit can they be compared. Ratios are used to compare two objects.
Given At Charles School, 1/5 of the 75 students in seventh-grade play in the jazz band.
In the form of a ratio
1/5 the students out of 75 play in the jazz band
Total students play in the jazz band = 75* 1/5
Total students play in the jazz band = 15
Therefore, The jazz band has 15 seventh graders playing according to the ratio.
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2
What is (2 + 0.4 + 0.6)= ?
Answer:
What is (2+0.4+0.6)
First we have to arrange the numbers in sequence...
[tex]2.0 \: + \: 0.4 \: + 0.6 \\ 3.0 \: or \: 3[/tex]
Here I have taken this 0 after the point ..as the rest of the digit are in tenths place or after the point...
The answer is 3.
We will not calculate the 0 as it does not have any value.
Ans) 3
Hope this helps you...SOMEONE PLEASE HELP!!!!
Answer: it’s C
T r u s t M e ;)
Someone please help.
Answer:
3a. 84
3b. 150
Step-by-step explanation:
(3*7)+(3*21)
what is 3*7? it's 21
what is 3*21? it's 63
so 21 + 63 is the answer to the first question :D
10*(8+7)
8+7 first cause it's in parentheses
15
10*15 is equal to 150
please answer this !!!
If f(x) = x^3 – 10x^2 + 29x – 30 and f(6) = 0, then find all
of the zeros of f(x) algebraically.
what is the answer for x = -8
Answer:
Need more info
Step-by-step explanation:
x = -8 cant be simplified any more, that should be the answer if the question is asking for the value of x. I cant see the problem please send a picture of the question.
Solve the inequality.
8+k≤−3
The solution is
.
Answer: k [tex]\leq[/tex] -11
Step-by-step explanation:
8 + k [tex]\leq[/tex] -3 Subtract 8 from both sides
-8 -8
k [tex]\leq[/tex] -11
The solution to the given inequality 8 + k ≤ -3 is k ≤ -11 which represents all values of k that are less than or equal to -11.
What is inequality?Inequality is defined as mathematical statements that have a minimum of two terms containing variables or numbers that are not equal.
The given inequality is given in the question:
8 + k ≤ -3
To solve the inequality 8 + k ≤ -3, you can start by subtracting 8 from both sides to isolate the variable:
k ≤ -3 - 8
k ≤ -11
The solution to this inequality is all values of k that are less than or equal to -11. This includes all negative numbers less than or equal to -11, as well as -11 itself.
Therefore, the solution to the given inequality is k ≤ -11.
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Find the slope of the line through each pair of points (-17, 11) , (-12, 9) 
Answer:
M = -2/5
Step-by-step explanation:
To find the slope of a line when you know two points, use the following formula.
M = y₂ - y₁ ÷ x₂ - x₁
M = 9 - 11 ÷ -12 - (-17)
M = -2 ÷ 5
M = -2/5
Hope that helps.
HELP ME, PLEASE. I REALLY NEED IT
Find x:
[tex]S=\frac{1}{sin2x}+\frac{1}{sin4x}+\frac{1}{sin8x}+...+\frac{1}{sin2^{n}x }[/tex]
Answer:
cotx - cot2ⁿxStep-by-step explanation:
Note: finding the sum not xFirst rewrite the first term as:
1/sin2x = sinx / (sinxsin2x) = sin(2x-x) / (sinxsin2x) =(sin2xcosx - cosxsinx) / (sinxsin2x) = (sin2xcosx)/(sinxsin2x) - (cos2xsinx)/(sinxsin2x) = cosx/sinx - cos2x/sin2x = cotx - cot2xNow the sum is:
S = cotx - cot2x + cot2x - cot4x +... + cot2ⁿ⁻²x - cot2ⁿx =cotx - cot2ⁿx9(3+c+4) =
Help!!!!!!!!!!
Please help me will be much appreciated <3
Answer:
She earned 300 dollars by selling 100 headbands.
Becca’s dog walking business started with 1 dog. She walks 2 additional dogs each month.
The graph represents the problem. How many dogs does she walk in the third month?
Answer:
7 is the correct answer
2 each month + 1 that she started of with = 7 I hope this helped.
Solve d - (-2) = 19 for d.
d =
Answer:
d=17
Step-by-step explanation:
Negative and Negative adds up to a Positive so...
d + 2 = 19
19-2=17
d=17
4x - 3y + 9x + (-2) - 10y + 12
what is it simplified or it says simplify *all* expressions
12 points
8. Javier worked out the following on his math homework: "What
equation best represents the relationship between x and y in the graph?"
Javier's answer was y= - 4x - 2. Is he correct? If not, explain what he did
wrong AND give the correct answer. (This question will be hand graded) *
1096
2716810
M
change from word form to standard form: five hundred five and fifty thousandths
Anwer: Five hundred five and fifty thousandths in standard form is 505.05
What is the approximate area of the shaded sector in the circle shown below?
Answer:
C. 297
Step-by-step explanation:
Area= 105/360(pi*18^2)
Area=296.73
Use inductive reasoning to predict the next month in the pattern: January, April, July...
A.) November
B.) August
C.) October
D.) September
Answer:
c.) October
Step-by-step explanation:
the pattern just skip two months
If f(x)= (2x +5)and g(x) = (2x2−5x+3), find f(x) · g(x) (please help)
A. 4x3 − 31x + 154x3 − 31x + 15
B.4x3 − 20x2 +19x + 154x3 − 20x2 +19x + 15
C.4x3 − 19x + 154x3 − 19x + 15
D.4x3 + 20x2 − 19x +15
Answer: 4x³-19x+15
Step-by-step explanation:
We are given f(x) and g(x). Since we need to find f(x)·g(x), we multiply f(x) and g(x).
[tex](2x+5)(2x^2-5x+3)[/tex] [distribute by FOIL]
[tex]4x^3-10x^2+6x+10x^2-25x+15[/tex] [combine like terms]
[tex]4x^3-19x+15[/tex]
Now we know [tex]4x^3-19x+15[/tex] is the correct answer.
From the details in the article, what inference can you make about Katie?
A) Katie is well-meaning but sometimes impractical.
B) Katie is hardworking and generous to others.
C) Katie is friendly but prefers to keep to herself.
D) Katie is free-spirited and love to have a good time.
Answer:
B
Step-by-step explanation:
She was working hard on her garden, and she was generous by donating.
The inference that can you make about Katie :
B) Katie is hardworking and generous to others.
"Gardening"
The inference that can you make about Katie is hardworking and generous to others.
She was working hard on her plant, and she was generous by giving.
Gardening is the laying out and care of a plot of ground given somewhat or entirely to the developing of plants such as blossoms, herbs, or vegetables.
Thus, the correct answer is B.
Learn more about "Kathie":
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A cheetah's speed was timed overa
100-yard distance. The cheetah was
(PLEASE HELP ME)clocked running 70 miles per hour. Which
equation shows the relationship between
the distance, y, and time, x, the cheetah
runs?
Answer:
y = 70x
Step-by-step explanation:
Note that d = rt where d is the distance, r is the rate/speed, and t is the time. Since we are given that the variable x is the time, 70mph is the speed, and the variable y is the distance, we can substitute these into d = rt, which we get y = 70x.
I hope this helps! :)
test corrections....
What is the area of this shape?
7 inches
4 inches
5 inches
A. 17.5 square inches
B. 25.5
C.27.5
D. 35.5
E.37.5
Answer:
c because 5×4=20 and 3×5÷2=7.5= 27.5
Solve there Systems of equations. Step - by - Step 2x + y = 15
3x - y = 5
Answer:
2x+y=15, 6x+3y=45
3x-y=5, 6x-2y=10
Y=35, plug it in, x=-10
Step-by-step explanation:
9) How much edging is needed to go
around a bulletin board that is 3 feet
high and 2 feet wide?
Answer:
10 feet worth
Step-by-step explanation:
3+3=6
2+2=4
6+4=10