Answer:
15x - 45 and -45 + 15x
Step-by-step explanation:
1. 15(x-3)
2. 15(3) = 45
3. 15x-45
4. -45 + 15x = 15x-45
5(3x - 9) and 3(5x - 15) are the other two expressions.
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
15 (x - 3)
This can be written as:
1)
5 x 3 (x - 3)
5(3x - 9)
2)
3 (5x - 15)
Thus,
The other two expressions are:
5(3x - 9) and 3(5x - 15).
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8/3 = 3 (c + 5/3) how to solve step by step
Answer:
Step-by-step explanation:
8/3=3(c+5/3)
multiply both sides by 3
8=9(c+5/3)
divide both sides by 9
8/9=c+5/3
subtract 5/3 from both sides
c=8/9-5/3
change 5/3 to 15/9
c=8/9-15/9
c=-7/9
The Chromebook has 25% battery at the beginning of getting
charged. An additional 1 percent is gained every 4 minutes.
IPhone
Answer this questions
1)which is charging faster
2)how much faster?
3)which device started with more charge
4)how much more
5) which device will be charged first
Answer:
Chromebook: 0.25 percent per minute
iPhone: 0.5 percent per minute
1) The phone
2) Faster by 0.25 percent per minute, or 1 percent every four minutes
3) The phone
4) 25 percent more
5) The phone
through (-5.-2) with a slope = 4/5
can someone pls help it’s rate of change and i only need to do all of the evens. it’s due in an hour
Answer: I wasn't sure if number 18 was 350.00 but that's what I put down to do the problem hope I'm not too late.
9. $72.45
10. $15.52
11. $30.69
12. $48.95
13. $6.39
14. $67.6
15. $18.02
16. $51.6
17. $11.25
18. $175.00
19. $3.20
20. $10.00
21. $31.25
22. $45.90
Step-by-step explanation:
Today only, a table is being sold at a 32% discount. The sale price is $357.
What was the price yesterday?
Answer:
Step-by-step explanation:
(1-0.32)p=357
0.68p=357
p=$525
Answer:
471.24
Step-by-step explanation:
First you want to find 32% of 357, which is 114.24. Then you want to add that onto 357. Hope this helps!
how many terms are in the following?
5x-7+8k+2x+k
Answer: 5
Step-by-step explanation:
Terms are single numbers, variables, or the product of a number and variable.
While in Manchester, England, Jaslene bought a sweater for £28(GBP). When she returned,
she saw the same sweater for $38CAD. Which sweater cost more? By how much in Canadian
dollars?
Answer:
The Manchester, England sweater is more expensive.
27 GBP is equal to 49.52 CAD, which is more than the 38 CAD from the afterwards.
Step-by-step explanation:
Help ASAP! Question 12 points)
05.02 MC
The angles below are supplementary. What is the value of x? (5 points)
5
7.5
15
30
Answer:
D
Step-by-step explanation:
supplementary means two angles that there sum will be 180. and 30 x 4 = 120 + 20 = 140 and if you add the other angle 40 that's 180.
PLEASE HELP!!!!!!!!!!!! VOLUME OF A CONE!!!!!!
Hi! Your answer is 125/3 π
Please see an explanation for a clear understanding to the problem.
Any questions about the answer/explanation can be asked through comments! :)
Step-by-step explanation:
For this problem, I'll be demonstrating two methods to solve your problem which are Integration method and Formula method. Let's start with Formula method first!
Formula Method
Volume of Cone Formula
[tex]V=\huge{\frac{1}{3}\pi r^2h}[/tex]
r is a radius. Therefore, r² is a diameter.
h is height of cone.
Our r is 5. Therefore, 5² = 25.
Our h is 5.
Substitute these values in the equation.
[tex]V=\huge{\frac{1}{3}\pi (5)^2(5)}\\V=\huge{\frac{1}{3}\pi (25)(5)} \\V=\huge{\frac{1}{3}\pi (125)}\\V=\huge{\frac{125}{3}\pi}[/tex]
Hence, the volume of a cone is 125/3 pi. If you want in Mixed Number form then It'd be 41 and 2/3 pi [ 41 2/3 pi]
Integration Method - Proof
Let r':r = x:h
Therefore,
[tex]\huge{\frac{r'}{r}=\frac{x}{h}}\\\huge{r'=\frac{x}{h}r[/tex]
r and h both are same (r is still radius while h is still height)
[tex]\huge{S(x)=\pi(r')^2[/tex]
The reason why we add pi because the surface is a circle. If the surface is not a circle, we don't add pi.
[tex]\huge{S(x)=\pi(\frac{x}{h}r)^2}\\\huge{S(x)=\pi(\frac{x^2r^2}{h^2})}\\\huge{S(x)=\frac{\pi r^2}{h^2}x^2}\\[/tex]
The range starts from 0 ≤ x ≤ h
[tex]\huge{V=\int\limits^h_0 {S(x)} \, dx[/tex]
Substitute S(x) in.
[tex]\huge{V=\int\limits^h_0 {\frac{\pi r^2}{h^2}x^2 } \, dx[/tex]
Integrate, separate everything in the integrand out except for x^2
[tex]\huge{V=\frac{\pi r^2}{h^2} \int\limits^h_0 {x^2} \, dx}\\\huge{V=\frac{\pi r^2}{h^2}[\frac{1}{3}x^3]^h__0}}\\\huge{V=\frac{\pi r^2}{h^2}[\frac{1}{3}h^3]}\\\huge{V=\pi r^2[\frac{1}{3}h]}\\\huge{V=\frac{1}{3}\pi r^2h}[/tex]
As you notice, Integration method is pretty useful, but it's mostly for an advanced volume lesson only.
Integration Method - Problem Solving
Let r':r = x:h
r is given as 5
h is given as 5 as well.
Therefore, r':5 = x:5
[tex]\huge{\frac{r'}{5}=\frac{x}{5}}\\\huge{r'=\frac{x}{5}(5)}\\r'=x[/tex]
[tex]\huge{S(x)=\pi(r')^2}\\\huge{S(x)=\pi(x^2)}\\\huge{S(x)=\pi x^2}[/tex]
The range of volume starts from surface to height. Therefore the range is 0 ≤ x ≤ 5
[tex]\huge{V=\int\limits^5_0 {S(x)} \, dx }\\\huge{V=\int\limits^5_0 {\pi x^2} \, dx }\\\huge{V=\pi\int\limits^5_0 {x^2} \, dx }\\\huge{V=\pi[\frac{1}{3}x^3]^5__0}}\\\huge{V=\pi[(\frac{1}{3}(5)^3-\frac{1}{3}(0)^3]}\\\huge{V=\pi[(\frac{1}{3}(125)-0)]}\\ \huge{V=\pi[(\frac{1}{3}(125)]}\\\huge{V=\pi(\frac{125}{3})}\\\huge{V=\frac{125}{3}\pi}[/tex]
Notice that both methods have same answer. Hence, we can conclude that the volume of a cone is 125/3 pi units²
mrs. washington's class has x student. Three-fourths of these students like pizza.If 21 students in the class like pizza, which equation can be solved to determine the number of students in the class?
A. 21x = 3/4
B. 21x = 4/3
C. 4/3x = 21
D.3/4x = 21
What is the equation of the line that passes through the point (-4, 7) and has an
undefined slope?
Answer:
x = -4
Step-by-step explanation:
Since the slope is undefined, the line is a vertical line. All vertical lines have an equation x = k. In your problem k = -4, so the equation of the line is x = -4
A student is solving -5+2x=15 find the students mistake and correct it
Answer:
correct students
-5+2x=15
2x=15+5
2x=20(divided by 2 both sides)
x=10
mistake students
-5+2x=15
-3x=15(divided by - 3 both sides)
x=-5
The required simplified value of the given expression is given as x = 10.
What is simplification?The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
here,
Given expression,
-5 + 2x = 15
Now,
Adding 5 on both sides,
2x = 15 + 5
2x = 20
Divide by 2 into both sides
x = 10
Thus, the required simplified value of the given expression is given as x = 10.
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The question is incomplete, the correct solution is given above, to determine the mistake of the student, compare the above solution with the student solution.
MP1 18. Allen has 13 carrots. He wants to put an equal amount of carrots into
5 sandwich sized bags. How much should Allen put into each bag?
Show your work.
Answer:
Put 2.6 carrots in each bag.
Step-by-step explanation:
Just divide the carrots with 5.
13 carrots / 5 sandwhich bags
This then makes 2.6 carrots which is a perfect fit for each bag.
A jogger ran 6 miles due east of his house. Then he ran 4 miles at a heading of 30o East of North (or 30o NE). How far is he from his house after running 10 miles?
Answer:8
Step-by-step explanation:
Answer: square root of 76
Step-by-step explanation:
6^(2)+4^(2)-2*6*4*cos120= 76 and then to simplify you square root it
The population of the town increased from 175000 to 262500 in a decade. What is the average percent increase of population per year?
Answer:
5%
Step-by-step explanation:
As given,
The population of the town increased from 175000 to 262500 in a decade.
⇒ In 10 years , population increased from 175000 to 262500
⇒% increase = [tex]\frac{262500 - 175000}{175000}[/tex]× 100% = [tex]\frac{87500}{175000}[/tex]×100% = 0.5×100% = 50%
Now,
Average % increase = [tex]\frac{percent increase}{Total years}[/tex] = [tex]\frac{50}{10}[/tex]% = 5%
∴ we get
Average percent increase of population per year = 5%
The volume of a cone-shaped tunnel is 424 cubic centimeters. The height of the funnel is 5 centimeters. Find the radius of the funnel. Round your answer to the
nearest whole number.
Answer:
volume of cone=424cm³
height(h)=5cm
radius (r)=?
Step-by-step explanation:
we have
volume of cone=1/3(πr²h)
424=1/3(22/7×r²×5)
424×3=15.71r²
r²=1272/15.71
r=√80.9=8.9=9cm
The side length of the base of a square pyramid is 30 centimeters. The height of the pyramid is 45 centimeters. What is the volume of the pyramid in cubic centimeters.
Answer: 450 cm³ is the volume
Step-by-step explanation:
Volume of pyramid = L x W x H divide by 3
The required volume of the given square pyramid is 20,250 cubic centimeters.
Given that,
The side length of the base of a square pyramid is 30 centimeters. The height of the pyramid is 45 centimeters. The volume of the pyramid in cubic centimeters is to be determined.
Volume is defined as the ratio of the mass of an object to its density.
Here,
The volume of the square pyramid is given as,
= 1/2 area of base × height
= 1/2[30×30]×45
= 900 × 45 / 2
= 20,250 cubic centemeters.
Thus, the required volume of the given square pyramid is 20,250 cubic centimeters.
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How many perpendicular bisectors are required to be constructed to devide a line segment into four equal parts?
Answer:
Three perpendicular bisectors are required
Step-by-step explanation:
A perpendicular bisector of a line segment is a line that cuts the line segment at a 90° angle, dividing it into two equal halves.
In this example, one bisector produces two equal parts of the segment
two bisectors produce three segments and three bisectors, four segments as shown in the diagram.
Perpendicular bisectors are constructed using a compass and a pencil, you can check out how to construct one, it is pretty interesting.
Please help quickly!!!
Answer:
I might be wrong but Karl misplaced the (5). Karl puth the 5 in the (x) area instead of the y.it had to be (3-5)^2
Find the value of x. Round to the nearest tenth
PLEASE HELP
Answer:
x = 38.2°
Step-by-step explanation:
sin 27° = x°
11 15
15 · (sin 27°) = 11 · x°
cross-multiply:
6.81 = 11x
6.81 / 11 = x
x = 0.619
sin^-1 (0.619) = 38.2°
PLEASE HELP ME SOLVE THIS PROBLEM ASAP
Answer:
r = 1
Step-by-step explanation:
How many terms are in the given expression?
52 + Zn - 2f
Answer:
3
Step-by-step explanation:
Answer:
3 terms are given
Step-by-step explanation:
In \triangle VWX,△VWX, \overline{XV}\cong \overline{WX}
XV
≅
WX
and \text{m}\angle W = 27^{\circ}.m∠W=27
∘
. Find \text{m}\angle X.m∠X.
Answer:
m<X = 27 degrees
Step-by-step explanation:
From △VWX, since WX = XV, this mean that the triangle is isosceles
The base angle of an isosceles triangle are equal hence <W = <X
Since <W = 27 degrees, hence m<X = 27 degrees
A painter paints rooms in a house. The painter purchases 12 gallons of paint and uses 4 gallons on the first day of work.
Which equation could be used to find how many gallons of paint are left, g?
g+4=12
g÷12=4
4×g=12
12+g=4
Answer:
g+4=12
Step-by-step explanation:
Since the painter used 4 of the 12 gallons, the painter now has 8 gallons, so g=8.
The equation g+4=12 represents this because if we solve it by isolating g then we get that g=8.
Which shows the simplified expressions ordered from least to greatest by the value of the exponent?
Answer:
Step-by-step explanation:
theres no information
Answer:
none because there are no numbers there I'll help you when you add the numbers
Step-by-step explanation:
but have a good rest of your day :) ❤
∠xangle, x and \angle y∠yangle, y are supplementary angles. \angle y∠yangle, y measures 142^\circ142 ∘
Answer:
Angle x = 38°
Step-by-step explanation:
It is important to note that:
Two angles are called supplementary when their measures add up to 180 degrees.
Angle x and y are supplementary
Angle y = 142°
Hence,
Angle x = 180° - 142°
Angle x = 38°
Which of the following represents the area of the shaded region in the figure above?
∫dcf(y)dy
the integral from c to d of f y d y
A
∫ba(d−f(x))dx
the integral from A to b of open paren d minus f of x close paren, dx
B
f′(b)−f′(a)
f prime times b minus f prime times A
C
(b−a)[f(b)−f(a)]
open paren b minus A close paren times open bracket f of b minus f of A close bracket
D
(d−c)[f(b)−f(a)]
It's B isn't it? If this is the question I'm thinking of. No image here so I'm just guessing.
Madelyn bought 12 5/8 yards of fabric. She used 6 7/8 yards of the fabric for a costume. How much fabric did Madelyn have left?
Answer:
[tex]5\frac{3}{4}[/tex]
Step-by-step explanation:
We know that Madelyn bought 12 5/8 of fabric, we then are told she used 6 7/8 of them for a costume followed by asking how much fabric she has left.
Madelyn has 12 5/8 in total
She took away 6 7/8.
To make this easier for us, we can make both fractions improper, which can be done by multiplying the whole number by the denominator and adding the numerator.
[tex]12\frac{5}{8} -6\frac{7}{8}[/tex]
Multiply the whole number by the denominator :
[tex]\frac{5}{96} - \frac{7}{48}[/tex]
Add the numerator and change the denominator back to 8 :
[tex]\frac{101}{8} - \frac{55}{8}[/tex]
Subtract the numerators :
[tex]\frac{101 - 55}{8} = \frac{46}{8}[/tex]
Simplify the fraction to the lowest possible :
[tex]\frac{46/2}{8/2} = \frac{23}{4}[/tex]
Put the improper fraction back into a mixed fraction :
[tex]5\frac{3}{4}[/tex]
4. A worker uses 450 inches of steel wire to make 300 springs of the same size. At this rate how many inches of steel wire are needed to make 1 spring?
Answer:
1.5 inches. you take 450 and divide it by 300
please help work this out
Answer:
Area=190.091 cm^2
Step-by-step explanation:
Area = 1/2(Pi x r^2) one-half because it's a semi-circle
Area=1/2(3.14 x 11^2)
11^2=121 so, Area=1/2(3.14 x 121)
Area=1/2(379.94)
Area=189.97 cm^2
adjustment:
Area=1/2(3.142 x 11^2)
Area=1/2(3.142 x 121)
Area=1/2(380.182)
Area=190.091