Answer:7√(10x)×√6/(√6×√6)=7/6×√60x
Step-by-step explanation:
Suppose you make coffee and it starts off just too hot to drink, so you put it in the refrigerator temporarily to cool it off. If the original temperature is 190 degrees Fahrenheit and the refrigerator is 36 degrees Fahrenheit, what will the temperature of the coffee be after 3 minutes? (k = 0.12)
Answer:
Step-by-step explanation:
f(x)= 36( 1 - 0.12)^x. F(x)= 36(0.88)^3. f(x)= 95.04 190-95.05 = 94.95 degree.
Because the temperature is going down, we will use (1-0.12) instead of (1+0.12). X=3 because it is what temperature after 3 min. x= time.
I don't understand the question that well, but please don't report me. I will fix it if I can.
12. There are multiple correct answers. Be sure to show all your work. A team of students have built a water
powered rocket for chemistry class. Their challenge is to hit a target on the ground that is 300 feet away. They
have built a rocket that maintains a straight flight at a speed of 60 miles per hour. Once the propulsion stops, the
rocket will descend at a 67-degree angle and a speed of 15 miles per hour.
What angle should the rocket be launched at to hit the target?
How far will the rocket travel through the air?
How much time will the rocket spend in the air?
Answer:
1 560 000 miles / hr
Step-by-step explanation:
Which expressions are solutions to the equation 3/4x = 15? Select all that apply.
(answers are in the picture)
Answer:
ez
Step-by-step explanation:
The solution is, A. & E. x=15/3/4.
What is equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign. In its simplest form in algebra, the definition of an equation is a mathematical statement that shows that two mathematical expressions are equal. For instance, 3x + 5 = 14 is an equation, in which 3x + 5 and 14 are two expressions separated by an 'equal' sign.
here, we have,
given that,
3/4x = 15
x= 15÷3/4
x=15/3/4
Hence, The solution is, A. & E. x=15/3/4.
To learn more on equation click:
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The area of a rectangle is 756 square centimeters. The of the long the width is 7:3. Find the length and the width
Answer:
18 cm and 42 cm
Step-by-step explanation:
a = wl
7w = 3l, then l = 7/3w
756 = w(7/3w)
756 = 7/3w²
w² = 324
w = 18
l = 42
pls help reward brainleist
Answer:
number 1: {0,-6) number 2: f(-2)=25 number 3: x=±10 number 4:B, or x=-2, x=3
number 5:36 i really hope this helps! have a good day!
Step-by-step explanation:
1: 2x^2+12x +0=0
this is how you set it up
next, you have to find the a,b,and c. This is my personal favorite way of doing this.
a=2 b=12, c=0
you plug it in to the quadratic formula which is
-b±√b^2-4ac/2a
(-12)±√(12)^2-4(2)(0)/2(2)
next you have to simplify
-12±√144-0/4
take the square root of 144
-12±12/4-
then, find the solutions of them
-12+12=0
0/4=0
x=0
we are not done yet
-12-12=-24
-24/4
x=-6
your solutions are 0,-6, which is C
2: it is giving us x, which is -2
plug in -2 to the right side of the equation.
2(-2)^2-4(-2)+9
2(4)-8+9
8-8+9
f(-2)=9
3: this one is fairly simple
x^2=100
take the square root of each side
x=±10
4: you have to replace y for 0 in this one
x^2-x-6=0
all you have to do is factor it out, and it turns into
(x+2)(x-3)
then turn these so they equal 0
x+2=0, x-3=0
x=-2 x=3
your answer would be B
5: this one is fairly simple too
the formula to completing the square is (b/2)^2
you plug in b, which is 12
12/2=6
6^2=36
you would add 36 to each side.
Answer:
7) {0, -6}
1) 25
2) x= ±10
3) x= 3, -2
4) 36
5) 225/4
6) x = -3±[tex]2\sqrt{3}[/tex]
Step-by-step explanation:
1) 2x^2 -4x + 9
2(-2)^2 - 4(-2) + 9
8+ 8 + 9
25
marty has 1 1/3 jugs of apple juice. he uses 3/4 of the juice to make freeze pops. what fraction amount of a jus doe marty have?
Answer:
He has 1/3 of a jug left.
Step-by-step explanation:
He starts with 1 1/3 jugs.
He uses 3/4 of 1 1/3 jugs.
A full amount is 1 or 4/4. If he uses 3/4, he has 1/4 left since
1 - 3/4 = 4/4 - 3/4 = 1/4
That means he has 1/4 of 1 1/3 jugs left.
We need to multiply 1/4 by 1 1/3.
1/4 * 1 1/3 =
= 1/4 * 4/3
= 4/12
= 1/3
Answer: He has 1/3 of a jug left.
A storekeeper increased the price of hats by 5%. Write an equation to calculate the increase of the total cost, c, when the price of a hat is p dollars.
Answer:
c = 1.05p
Step-by-step explanation:
the price of the hat before the increase was 100%, after the increase it becomes 100 + 5% = 105%. Representing it as a decimal becomes 1.05p
Let illustrate with an example.
The price of a hat was $100, after the 5% increase. the cost of the hat becomes
100 + (0.05 x 100) = 105
To find the percentage increase
divide 105 by 100 and subtract 1
(105/100) - 1 = 1.05
solve the equation (x-4)(2x+3) = 4
Answer:
(x-4.34)(x+1.84)=0
Step-by-step explanation:
2x^2 -5x-16=0
delta=
[tex]25 + 4 \times 2 \times 16 = 153[/tex]
x1,2=
[tex](5 + \sqrt{153} ) \div 4 = 4.34 \\ (5 - \sqrt{153} ) \div 4 = - 1 .84[/tex]
Let f(x) = 2/x and g(x) = 2/x what is (g o f)(x)?
Answer:
(g o f)(x) = x
Step-by-step explanation:
Given the functions f(x) = 2/x and g(x) = 2/x
(g o f)(x) = g(f(x))
g(f(x)) = g(2/x)
Replace x with 2/x in g(x)
g(f(x)) = 2/(2/x)
g(f(x)) = 2 * x/2
g(f(x)) = 2x/2
g(f(x)) = x
Hence the composite function g o f)(x) is x
Find the value of x
Answer:
x= 3.5
Step-by-step explanation:
Find the slope for the trend using points (2,2) and (4,3)
Answer:
Step-by-step explanation:
m = 1 / 2 = 0.5
The radius of a circle is 7 kilometers. What is the diameter?
Answer:
14kilometers
Step-by-step explanation:
diameter=2*radius.
-6x -6y = 66
2x + 4y = -32
Answer:
(23/2, 1/2)
Step-by-step explanation:
Let's solve this system through elimination by addition/subtraction:
Divide all three terms of the first equation by 3. This results in the equivalent system
-2x - 2y = 33
2x + 4y = -32
Combining like terms results in:
2y = 1, and so y = 1/2.
Let's use the first equation and y = 1/2 to find x:
-6x - 6(1/2) = 66
This becomes -6x - 3 = 66, or -6x = 69, or x = -69/6 , or x = 23/2
The solution is thus (23/2, 1/2)
-
A missing piece of a board game, a circular disk, had an area of 100,608.7, the replacement disks are listed using circumferences, what size circumference should be ordered 1. 1,124.12 mm 2. 0.7 mm 3. 179 mm 4. 1,263,645.774 mm
Answer:
1,124.12 mm
Step-by-step explanation:
Steps to answering this question :
First determine the radius of the circle from the area of the circle
Use the radius determined above to calculate the circumference
Area of a circle = nr²
where r = radius
n = pi = 3.14
100,608.7mm = nr²
to determine the radius, divide both sides of the equation by 3.14
32,040.98726mm = r²
Find the square root of 32,040.98726mm
√32,040.98726mm
r = 179mm
Circumference of a circle = 2nr
2 x 179 x 3.14 = 1,124.12 mm
sally’s huge dog weighed 175 pounds in 2018 and then weighed 145 pounds in 2020 what is the rate of change and weight?
Answer:17.14%
Step-by-step explanation:
145 x
_____=_____
175 100
145(100)=175(x)
14500=175x
__________
175 175
x=82.86
100-82.86=17.14%
20 POINTS FOR THIS GUYS
Answer:
Slope is 5
Y-intercept is 35
what is the value of x in the equation x^3=.027
A.0.03
B.0.5
C. 3
D. .09
Answer:
D.
Step-by-step explanation:
5. A dining room chair has four legs.
You begin placing chairs around a
table that seats five people.
Answer:
20
I assume the question asks how many chair legs there are in total.
If a chair has four legs and you have five chairs, you would multiply 5 times 4.
5 times 4 = 20
HELP PLEASE THIS IS URGENT NEED IT DONE
Answer:
here are my hypothesis
Step-by-step explanation:
0=0$
1= 5.99$
2 = 11.98$
3 = 17.97$
4 = 23.96$
5 = 29.95$
6 = 35.94$
Name the variables: 23xy - 4
Answer:
x, y
Step-by-step explanation:
-4 and 3x + 5y = 0
Solve the system of equations 5x +9y
by combining the equations.
Answer:
Sorry this question does not make any sense. Delete it and re-type the equations correctly.
Step-by-step explanation:
How do I express the letters in bracket as the subject of the formula ?
especially the 1/2 power is new and unfamiliar to me.
Answer:
[tex]n = 144m^2 - 1[/tex]
Step-by-step explanation:
__________________________________________________________
FACTS TO KNOW BEFORE SOLVING :-
Let x be a number. ⇒ [tex]x^{\frac{1}{2}}[/tex] can also be written as [tex]\sqrt{x}[/tex].To make any variable the subject of any formula , we need to isolate it.__________________________________________________________
According to the question ,
[tex]3m = \frac{(n + 1)^{\frac{1}{2} }}{4}[/tex]
Lets multiply both the sides by 4.
[tex]=> \frac{(n + 1)^{\frac{1}{2} }}{4} \times 4 = 3m \times 4[/tex]
[tex]=> (n + 1)^{\frac{1}{2} } = 12m[/tex]
It can be also written as :-
[tex]=> \sqrt{(n + 1)} = 12m[/tex]
Lets square both the sides.
[tex]=> [\sqrt{(n + 1)} ]^{2} = (12m)^{2}[/tex]
[tex]=> n + 1 =144m^2[/tex]
[tex]=> n = 144m^2 - 1[/tex]
The volume of the figure below is 120 cubic inches. Solve for x
Answer:
Step-by-step explanation:
Volume of triangular prism=120in³
Area of triangle ×length =120in³
1/2×6×x×4=120in³
12x=120
X=120/12=10in
A triangle has a base of 12 feet and a height of 8 feet. By how much does the height need to increase for the area to increase by 4.5 square feet?
Answer:
hello gimme-Dem points.
Step-by-step explanation:
Many large cities use taxes on entertainment tickets to pay for improvements to public facilities, like stadiums, arenas, and concert venues. A city council proposal would increase the current ticket tax in order to raise funds for a new public concert hall. Council representatives plan to conduct a survey outside of a large concert in the summer and ask selected adults if they would support an increase in the ticket tax to pay for the new concert hall. Which type of bias will most likely affect the survey results? This is response bias because it is likely that many who respond will not provide a truthful opinion of the ticket tax. This is undercoverage bias because only those attending the concert will have an opportunity to register an opinion. This is nonresponse bias because many who are asked about the ticket tax may choose to not provide a response. This is voluntary response bias because many vocal supporters of the ticket tax may demand to register their opinion.
Answer:
This is undercoverage bias because only those attending the concert will have an opportunity to register an opinion.
Step-by-step explanation:
Undercoverage bias occurs when the sample chosen for a research is not representative of the entire population. Most times when research involving surveys to obtain the opinions of people on a subject matter, the entire population affected by the issue cannot be surveyed. A sample that represents the true population can be used for this research.
In the survey above, the sample that was surveyed was not representative of the entire population of citizens paying taxes on entertainment tickets. The selection process does not represent the true population.
Answer:
b on ed
Step-by-step explanation:
right
which expression is equivalent to 2 3/5 divided by 7/9
Answer:
I don't know look it up lol
Step-by-step explanation:
that's what I did go to answers. com that's where I get all my answers that brainly doesn't provide that or ask a tutor
May someone help me out with these problems? Please explain
Answer:
Well you have to solve each problem first to make them the same. Let's do decimals.
a) The square root of 58 is 7.61577310586. Let's round that to 7.62. You can solve this with a calculator.
b) Simply -32.0, since it is a whole negative number.
c) I think there's a typo, 'C' is the second 'b)', which is 49/7. 49 divided by 7 is seven, hence the decimal would be 7.0
d) 2.65 repeated, already a decimal, does not need changed.
e) The square root of 6 is 2.44948974278. Let's round that to 2.45.
f) is just 0. no decimal, just 0.
Now that you have these as the same form of number, you have to put them into one of these categories. The categories can be found below.
Any square root number is irrational. Any never ending number is irrational, like pi, but there are none of those in this situation. So a, and e are all irrational.
Any repeated number, in this case, 2.65 repeated, is a rational number, as is any decimal or fraction, but there are none of these, so d is rational.
-32 is and integer, because it is a negative whole number, so b is an integer.
Whole numbers are any numbers 0+. So f is the only answer that is a whole number.
Natural numbers are any numbers 1+. So c or the second b is a natural number.
Hope this helps :)
Stay Cold,
Brook
The cost c in dollars of manufacturing x bicycles at a production plant is given by th function shown below C(x)=5x^2-1000x+63,500. How many bicycles must be manufactured to minimize the cost
Answer:
100 bicycle
Step-by-step explanation:
Given the cost c in dollars of manufacturing x bicycles at a production plant expressed as C(x)=5x^2-1000x+63,500.
x is the number of bikes
To minimize the cost, dC/dx = 0
dC/dx = 10x - 1000
Since dC/dx = 0
0 = 10x - 1000
-10x = -1000
x = 1000/10
x = 100
Hence the number of bicycles that must be manufactured to minimize the cost is 100 bicycle
Which set of angle measurements CANNOT be angle measures of a triangle?
Answer:
180
Step-by-step explanation:
Explanation: In a triangle, there can only be one obtuse angle. Additionally, all the angle measures must add up to 180.
Find the surface area of the solid below.