Answer:
A scientific idea can become a theory when you have enough prove to back it up and when it is supported by other scientists.
Junior wanted to ride a roller coaster at Six Flags. The sign says you have to be 48 inches to ride the roller
coaster. The roller coaster can travel 540 feet in 6 seconds.
1. What is the unit rate of the number of feet per second the roller coaster would move?
HELP
Answer:
90 feet per second.
Step-by-step explanation:
If it moves 540 feet in 6 seconds, than it moves 540/6=90feet per second.
Not sure what the height requirement has to do with this problem or what 'unit rate' is specifically referring to so this may not be the answer you're looking for but I hope this helped anyway!
solve for n 36=13n-4n
Answer:
n = 4
Step-by-step explanation:
36 = 13n - 4n
<=> 36 = (13-4).n
<=> 36 = 9n
<=> n = 36 / 9
<=> n = 4
What is the factorization of the trinomial below?
12x2-x-35
Answer:
(4x−7)⋅(3x+5)
Step-by-step explanation:
Its that because of the steps that you learn
PLEASE HELP DUE IN 30 MINUTES!!!
The last two answers for the last question are c. h(g(x))= 1/ (x^2 +4) and d. h(g(x))=1/x^2 +4
Answer:
I'm pretty sure the answer to the third question is C
Step-by-step explanation:
We are solving for h(g(x)).
We already know that g(x) is equal to x^2+4.
So know, we can simplify our expression, h(g(x)), to h(x^2+4).
We also know that h(x)=1/x
we simply substitute x for x^2+4, giving us an answer of 1/(x^2+4)
After taxes, Alexandra's take home pay is 3 10 of her salary before taxes. Enter and solve an equation to find Alexandra's salary before taxes for the pay period that resulted in $162 of take-home pay. Let s represent your variable. The equation is . Alexandra's salary before taxes for the pay period was $
Answer:
The equation is 3/10 × s = 162
Alexandra's salary before taxes for the pay period was $540
Step-by-step explanation:
Let
Alexander's salary before taxes
=s
3/10 if Alexander's take home pay is $162 after taxes
3/10 of s = $162
The equation is
3/10 × s = 162
Divide both sides by 3/10
s = 162 ÷ 3/10
= 162 × 10/3
= 1620 / 3
= $540
Alexandra's salary before taxes for the pay period was $540
13. Neely wants to go on a ride at Disney World with a minimum height restriction of
120 cm. She is 3 feet 4 inches tall. Can Neely go on the ride? (1 inch = 2.54 cm)
Explain your answer.
Answer:
101.6cm, no.
Step-by-step explanation:
One foot = 12 inches
Therefore 3 feet = 3x12=36 inches 36+4=40 inches total.
1 inch=2.54cm
40x2.54=101.6cm
So no, unfortunately she cannot go on the ride.
Hope this helped!
If AC = 18 and CD = 5, AD =
Select all the expressions that are equivalent to
5x + 8y + 2.
(Select all that apply.)
3x + y + 2x + 2 + 7y
8x + 4y – 3x + 4 – 3y
2 +12y + x – 4y + 5x
5y + 7 + x – 5 + 4x + 3y
Answer:
The expression equivalent are..
3x+y+2x+2+7y
Step-by-step explanation:
here we want to add the variables of the same in this case
3x 1y
2x 7y 2
__________
5x 8y 2
All the expressions that are equivalent to 5x + 8y + 2 are;
A). 5x + 8y + 2.
B). 5x +y + 4.
C). 5x + 8y + 2
D). 5x + 8y + 2.
What are the equivalent expressions?Expressions that are equivalent to the same thing, even when they have distinct appearances. When we enter the same value(s) for the variable, two algebraic expressions that are equivalent have the same value (s).
Given:
Four equivalent expressions,
A). 3x + y + 2x + 2 + 7y
B). 8x + 4y – 3x + 4 – 3y
C). 2 +12y + x – 4y + 5x
D). 5y + 7 + x – 5 + 4x + 3y
Simplifying,
A). 5x + 8y + 2.
B). 5x +y + 4.
C). 5x + 8y + 2
D). 5x + 8y + 2.
Therefore, A, C, and D are the equivalent expressions.
To learn more about the equivalent expression;
https://brainly.com/question/28170201
#SPJ5
A factory employee worked 3/4 of an hour to finish 2/5 of a project. At this rate, how many additional hours will the
employee require to finish the project?
0.45
0.5
1.125
01.25
1.875
Answer:
1.125 =x
Step-by-step explanation:
We can use ratios to find the time
We want to find the time needed to finish
1 - 2/5 = 3/5 We need the time for 3/5 of the project
3/4 hours x hours
---------------- = --------------
2/5 project 3/5 project
Using cross projects
3/4 * 3/5 = 2/5 * x
9/20 = 2/5x
Multiply each side by 5/2
9/20 * 5/2 = x
9/8 = x
1 1/8 =x
1.125 =x
6c-8-2c=-16+c what’s the value of c
Answer:
The correct answer is c = -8/3.
Step-by-step explanation:
The first step in solving this problem would be to simplify by combining like terms on the left side of the equation.
6c - 8 - 2c = -16 + c
4c - 8 = -16 + c
Then, we can subtract c from both sides of the equation to get rid of the positive c on the right side of the equation.
4c - c - 8 = -16 + c - c
3c - 8 = -16
Next, we can add 8 to both sides of the equation.
3c - 8 + 8 = -16 + 8
3c = - 8
Then, we can divide both sides of the equation by 3.
c = -8/3
Hope this helps!
–2 times the quantity q minus 3
Answer:
This question was worded weirdly however I am assuming this is algebra and you need the equation. So here- -2(q-3) or -2q+6
Step-by-step explanation:
Distribute the -2, to all the terms in the parenthesis of -2(q-3) you get 2q+6
If you didnt know how to get -2(q-3), -2(multiplied) by q-3, you use parenthesis to make sure you know it is multiplication in front of the parenthesis.
Hope I could help!
Given that a rectangle with length $3x$ inches and width $x + 5$ inches has the property that its area and perimeter have equal values, what is $x$
Answer:
First, we need to know how to calculate the area and the permiter of a rectangle.
To calculate the area, we multiply base by height and to calculate the perimeter, we sum all sides.
Knowing this, we can say that the area is 3x * (x+5) and the perimiter is 3x + 3x + x + 5 + x + 5, as we know both are the same, we write it as an equation:
[tex]3x * (x+5) = 3x + 3x + x + 5 + x + 5[/tex]
Now we solve the equation:
[tex]3x^2 +15x = 6x + 2x + 10[/tex]
[tex]3x^2+15x =8x + 10[/tex]
[tex]3x^2+15x-8x-10=0[/tex]
[tex]3x^2+7x-10=0\\\\x_1=\frac{-10}{3}\\x_2 = 1[/tex]
As the negative result doesn't have sense, we only pick the second one: 1.
If x = 1, then area would be 3*6 = 18 square inches and perimeter 3+3+6+6 = 18 inches
Answer:
[tex]\huge\boxed{x = 1 \ \ \ \ OR \ \ \ \ x = -\frac{10}{3} }[/tex]
Step-by-step explanation:
Length = 3x
Width = x + 5
Area of Rectangle:
=> (Length)(Width)
=> (3x)(x+5)
=> [tex]3x^2 + 15x[/tex]
Perimeter of Rectangle:
=> 2 (Length) + 2 (Width)
=> 2(3x) + 2(x+5)
=> 6x + 2x + 10
=> 8x + 10
Given Condition is:
Perimeter = Area
[tex]3x^2 + 15x[/tex] = 8x + 10
[tex]3x^2 + 15 x -8x - 10 = 0\\3x^2 + 7x -10 = 0\\3x^2 + 10 x - 3x -10 = 0\\x(3x+10) - 1(3x+10) = 0\\(x-1) (3x+10) = 0[/tex]
Either,
x - 1 = 0 OR 3x + 10 = 0
x = 1 OR 3x = -10
x = 1 OR x = -10 / 3
Tell which set or sets the number below belongs to: natural numbers, whole numbers, integers, rational numbers, irrational numbers, or real numbers. 0
Answer:
Step-by-step explanation:
Natural numbers are otherwise called counting numbers. Numbers you can count, and excludes Zero.
Whole number is a little extension of natural numbers in that, they contain Zero. So, they're counting numbers including Zero and excluding negative numbers.
Integers are whole numbers in general. They also include negative numbers.
Rational number is a number that can be written as ratio. It can be written as a fraction in which both the denominator and the numerator are whole numbers.
Irrational numbers are very opposite to rational numbers, and can not be written as fractions.
Real numbers are the culmination of both rational and irrational numbers
Find the value of x if O is between D & B and DO = 15, OB = 3x + 7, and DB = 9x - 2 x= ____
Answer:
x = 4
Step-by-step explanation:
DO + OB = DB
15 + 3x + 7 = 9x - 2
3x + 22 = 9x - 2
3x + 24 = 9x
24 = 6x
4 = x
8|x+2|-6=5|x-2|+3 I don’t understand how to solve this problem
Answer:
yes
Step-by-step explanation:
2+ 5 is 6
Of the 100 children in the sixth grade
class, 76 can go on the end-of-the-year
field trip. What percentage of the
children can go on the trip?
Any number out of 100 can be quickly converted to percent form by just tacking on the percent sign. This is because "percent" is "per one hundred". Think of 100 cents in a dollar which may help you remember.
So 76/100 = 76%
Celina and Zoe both sing in a band.
One evening the band plays for 80 minutes.
Celina sings for 65% of the 80 minutes.
8
Zoe sings for of 5/8 of the 80 minutes.
Celina sings for more minutes than Zoe sings.
Work out for how many more minutes.
Step-by-step explanation:
65% of 80= 80×0.65 = 52mins
5/8 of 80= 5/8×80 = 50 mins
more mins = 52-50= 2 more minAngle PSR measures 99°. What is the measure of ∠PSQ in degrees?
Answer:
A. 45°
Step-by-step explanation:
m<PSR is given as 99° = m<PSQ + m<QSR
m<PSQ = (3x + 18)°
m<QSR = (9x - 27)°
99 = (3x + 18) + (9x - 27)
Find the value of x using the expression above
99 = 3x + 18 + 9x - 27
99 = 12x - 9
Add 9 to both sides
99 + 9 = 12x
108 = 12x
Divide both sides by 12
9 = x
x = 9
Find m<PSQ
m<PSQ = (3x + 18)°
Plug in the value of x
m<PSQ = 3(9) + 18
m<PSQ = 27 + 18 = 45°
While on summer vacation, Mr. Duda traveled about 230 miles to a city near Dallas in 3 hours. How many miles
did Mr. Duda travel per hour?
Answer:
76 2/3 (Rounded = 77)
Step-by-step explanation:
Step 1: Divide 230 by 3.
Step 2: Get your answer.
Answer - 76.66666666...
Hope this helps!
So i missed a day at school and don't know how to solve 1.2/8.4 = w/14.
Can anyone help.
Answer:
To find W.
1.2/8.4=w/14.
then cross multiply
which is 14×1.2=8.4w.
16.8=8.4w.
w=2
The left and right page numbers of an open book are two consecutive integers whose sum is 321
Find these page numbers.
Answer:
160 and 161
Step-by-step explanation:
x is the first page and x + 1 is the second page
combine them and you get 2x + 1
2x +1 = 321
this simplifies to
2x = 320
divide by 2
320 = 160
give me brainliest
The difference of 15 and x is 12
Answer:
X is 3
Step-by-step explanation:
15-x=12
X=15-12
X=3
find the equation of the line parallel to H passes through (-4,2)
Answer:
y = [tex]\frac{1}{3}[/tex] x + [tex]\frac{10}{3}[/tex]
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate the slope m of H using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (0, - 3) and (x₂, y₂ ) = (3, - 2) ← 2 points on the line
m = [tex]\frac{-2+3}{3-0}[/tex] = [tex]\frac{1}{3}[/tex]
Parallel lines have equal slopes, thus
y = [tex]\frac{1}{3}[/tex] x + c ← is the partial equation
To find c substitute (- 4, 2) into the partial equation
2 = - [tex]\frac{4}{3}[/tex] + c ⇒ c = 2 + [tex]\frac{4}{3}[/tex] = [tex]\frac{10}{3}[/tex]
y = [tex]\frac{1}{3}[/tex] x + [tex]\frac{10}{3}[/tex] ← equation of parallel line
A falcon flew 70 miles in 3 hours. What was the speed of the falcon?
Answer:
23.3333333 miles per hour
23 1/3 miles per hour
10.43093333333333 meters / second
Step-by-step explanation:
Take the distance and divide by the time to find the speed
70 miles / 3 hours
1 mile = 1609.34 meters
1 hours = 3600 seconds
70 miles /3 hours * 1 mile /1609.34 meters * 1 hours / 3600 seconds
10.43093333333333 meters / second
Step-by-step explanation:
speed is normally measured in unit time meaning either per hour,second,minute etc
therefore for this question you will have to find what it travels per hour
if 70 is in three hours what about one hour
therefore
70/3=23.3'
so the speed will be 23.3miles per hour
(the apostrophe is to show recurring you can also round of and ignore it)
How to find 9^4 without multiplying four 9s
May I get some help? Thank you!
Answer:
vol. of triangular prism = lbh/2
vol. of rectangular prism = 18 of vol. of triangular prism
18x = 18 + 14x
4x = 18
x=4.5 ft
so vol. of rectangular prism = 6 × 4 . 5 × 3 = 81 ftcube
i really need help please answer this
Answer:
Option 1
Step-by-step explanation:
Solve each piece individually first.
4 ^(1/2) = 2
The 4th root of 16 is 2 so 2/2 = 1
So we have:
2 * 1 - 10 ÷ 2
Order of operations.
2 * 1 = 2 10 ÷ 2 = 5
2 - 5 = -3
The answer is the first option.
Anyone down to help? 12pts for PRE-ALGEBRA question Use the information in the table for 2–4.
Answer:
See attached image
Step-by-step explanation:
If the number of blueberries is the x value, and number of calories is the y value, then we can create the ordered pairs (5,4) (10,8) (15,12) based on the data in the table.
Plotting these on the graph is simple - just go to the x value then the y value and plot where these lines meet.
The slope of a line is always the rise over run.
Every time our x increases by 5, our y increases by 4. The rise is 4, and run is 5, so the slope is [tex]\frac{4}{5}[/tex]
Hope this helped!
show work plz !!!!!!!!!!!!
Step-by-step explanation:
5- 24/6 -8(8)
5-4 -64
-65
Answer:
-63
Step-by-step explanation:
insert in the missing value so it will be
5 - 24/6 - 8*8 you do division and multiplication first
24/60=4 and 8*8=64 so
5 - 4 -64 = negative 63
Arthur is organising his collection
of DVDs. He has 130 altogether.
The ratio of comedy films to
action to horror is 4 : 8 : 1
How many of each type of DVD
does he have?
Comedy
DVDs
Action
DVDs
Horror
DVDs
Answer: 40 comedy 80 action 10 horror
Step-by-step explanation: