Answer:
2A + 2b
Step-by-step explanation:
Distributive property
Jenny earns $30 a day working part time at a supermarket. Write an expression to represent the amount of money she will earn in d days.
Answer: d($30)
Explanation: $30 times d which d is the number of days.
Factorise 9x^2y+12xy^2
Answer:
3x(3xy + 4y^²).
Step-by-step explanation:
Mskqkkqkaak
What is the percent of decrease from 20 to 19?
Answer: 5%
Step-by-step explanation:
If 20 = 100% , 1 = 5%
20 - 19 = 1
So the percent of decrease = 5%
I am not a professional, simply using prior knowledge!
Note- It would mean the world to me if you could mark my answer brainliest!
1. The velocity of a car as it travels over a level crossing is modeled by v = t2 – 4t + 12
for 0 < t < 4 where t is the time in seconds after it reaches the crossing. When does the car reach its minimum speed? What is the minimum speed?
Show your work or strategy:
When does the car reach its minimum speed? _________________
What is the minimum speed? _________________________
Answer:
At t=2s the car reach its minimum speed
Minimum speed=8m/s
Step-by-step explanation:
We are given that velocity of car
[tex]v(t)=t^2-4t+12[/tex]
0<t<4
Differentiate w.r.t t
[tex]v'(t)=2t-4[/tex]
[tex]v'(t)=0[/tex]
[tex]2t-4=0[/tex]
[tex]2t=4[/tex]
[tex]t=2[/tex]
[tex]v''(t)=2>0[/tex]
The velocity is minimum at t=2 s
Substitute t=2
[tex]v(2)=2^2-4(2)+12[/tex]
[tex]v(2)=8m/s[/tex]
Hence, the speed of car is minimum at t=2 se and minimum speed of car=8m/s
kate pays $203 in advance on her account at the athletic club. Each time she uses the club, $9 is deducted from the account. Find the remaining in the account after 12 visits
Answer:
95
Step-by-step explanation:
The equation to solving this would be 203 - (9 multiply 12). If you multiply 9 and 12 you get 108. Minus 108 from 203 and you get 95.
Which of the following pairs of ratios are equivalent?
1) 38 : 133 and 16 : 56 , 2) 15 : 20 and 28 : 56
Answer:
38 : 133 and 16 : 56 are equivalent
Step-by-step explanation:
Given
1) [tex]38 : 133[/tex] and [tex]16 : 56[/tex]
2) [tex]15 : 20[/tex] and [tex]28 : 56[/tex]
Required
Determine which is equivalent
1) [tex]38 : 133[/tex] and [tex]16 : 56[/tex]
[tex]Ratio = 38 : 133[/tex]
Divide by 19
[tex]Ratio = 2:7[/tex] --- can't be further simplified
[tex]Ratio = 16 : 56[/tex]
Divide by 8
[tex]Ratio = 2:7[/tex]
Hence:
[tex]38 : 133[/tex] and [tex]16 : 56[/tex] are equivalent
2) [tex]15 : 20[/tex] and [tex]28 : 56[/tex]
[tex]Ratio = 15 : 20[/tex]
Divide by 5
[tex]Ratio = 3 : 4[/tex]
[tex]Ratio = 28 : 56[/tex]
Divide by 28
[tex]Ratio = 1:2[/tex]
Hence, both are not equivalent.
help me please i will give brainliest and excellent and thank you
math
Answer:
D
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
1) know your grams and centigrams!
1 Grams = 100 Centigrams
2) If you want to find the centigrams, all you gotta do is; multiply the gram to 100.
For example: This bar of chocolate has 100 grams of sugar. I wonder what is the mass in centigrams?
100 grams * 100 centigrams = 1,000 Centigrams.
3) To answer your question; multiply 347 by 100!
347 * 100 = 34,700 centigrams.
Hope this helps!
Find the slope. (10,-6) and (13,-7)
Answer:
-1/13
Step-by-step explanation:
i did it
Rachelle bought x pounds of fruit for
$2 per pound and a gallon of milk for
$3.79. She spent a total of $17.29. Write
an equation that can be used to find
how many pounds of fruit she bought.
Step-by-step explanation:
step 1. 2x + 3.79 = 17.29. this is the answer.
Sam says: 9.05kg is equal to 9500g. Is he right or wrong? Explain your answer.
Answer:
Step-by-step explanation:
Sam is wrong because 9,05 kg =9050g which is different to 9500g
Answer:
wrong 1 kilo in a gram is 1000 so u just going to add 1 zero on the back so 905+0= 9050 grams
find the slope of the line that passes through (8,10) and (5,5)
Answer:
5/3
Step-by-step explanation:
The slope is the rise over run or the change in y over the change in x. One way to find the slope is through the formula, which is [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]. To use this simply plug in the two points. In this case, the expression would be [tex]\frac{10-5}{8-5}[/tex]. This simplifies down to 5/3.
(06.04 HC) The graph shows Wilson's science scores versus the number of hours spent doing science homework. A graph titled Wilsons Science Scores shows Hours of Practice in a Week on x axis and Science Scores on y axis. The x axis scale is shown from 0 to 5 at increments of 1, and the y axis scale is shown from 0 to 50 at increments of 5.The ordered pairs 0, 15 and 0.5, 18 and 1, 18 and 1.5, 25 and 2, 30 and 2.5, 35 and 3, 40 and 3.5, 43 and 4, 41 and 4.5, 45 and 5, 48 are shown on the graph. A straight line joins the ordered pairs 0, 14.9 and 5, 50. What will most likely be Wilson's approximate science score if he does science homework for 6 hours a week? (5 points) Group of answer choices 33 points 42 points 52 points 55 points
Answer:
The answer 55
Step-by-step explanation:
Because it goes up by five for they gave us the amount of point they get for 5 hours and the amount of point he had for 5 hours was 50 so we just needed to add 5 more and 50+5= 55
I don't know if I made myself clear but good luck! :)
Answer
Personally I think it's 55 as well!
Step-by-step explanation:
Good luck! :)))
KFC sells whole chicken dinners for 12 and half chicken dinners for 8. Yesterday it sold a total of 400 dinners and took in 4200. How many of each size dinner were sold? What were the cedi sales of each size dinner?
Answer:
150 half chicken and 250 full chicken
Step-by-step explanation:
Represent whole chicken with w and half chicken with h.
So, we have:
[tex]Total = 400[/tex]
Which implies that:
[tex]w + h = 400[/tex]
Also:
[tex]Amount =\$4200[/tex]
Which implies that:
[tex]12w + 8h = 4200[/tex]
So, we are to solve for h and w from:
[tex]w + h = 400[/tex]
[tex]12w + 8h = 4200[/tex]
Make h the subject in the first equation
[tex]h = 400 - w[/tex]
Substitute 400 - w for h in the second equation
[tex]12w + 8(400 - w) = 4200[/tex]
[tex]12w -8w + 3200 = 4200[/tex]
[tex]12w -8w =- 3200 + 4200[/tex]
[tex]4w =1000[/tex]
[tex]w = 250[/tex]
Recall that:
[tex]h = 400 - w[/tex]
[tex]h = 400 - 250[/tex]
[tex]h =150[/tex]
If you have a cylinder with a volume of 282.6 ft3 and a cone with a congruent radius and height. What is the volume of the cone
The volume of a cone is 1/3 the volume of a cylinder with congruent dimensions, so:
286.6 / 3 = 95.53333... ft3
15x+2y=4000........(1)
10x=4y....(2)
find value of X & Y
Answer:
x = 400
y = 1000
Step-by-step explanation:
Step 1
mult by the first equation by 2
15x + 2y = 4000 ....... x 2
30x + 4y = 8000
the second equation is
10x = 4y
=
10x - 4y =0
then subtract the second equation from the first one
30x + 4y = 8000
- (minus)
10x - 4y = 0
the you will get
20x = 8000
x = 8000/20 = 400
then you will substitute value of x in any the give equation to work out the value of y
Markup & Markdown
In the questions below, you will be ask about situations involving markups and
markdowns. Anytime your answer deals with money, round to the nearest hundredths place and
include proper unit labels. Be sure to show all of your work for each problem.
1. The managers at the hunting store usually determine their prices by using a markup of 11
percent. If they purchased camo pants for $45 each, what will be the price for their customers?
2. The fishing store manager buys flies from a wholesale company for $2.50 apiece. If he prices
each fly for the customers at $3.75, what is the markup percentage?
0.45+100x 11=4.95+45=49.95
50-1008 2.50 = 1.25=50%,
3. The pet store managers purchase dog food from a wholesale company for $3.75 a bag. If
they sell the dog food to the customers for $5.00 a bag, what is the markup percentage they are
using?
Answer:
$49.95 ; 50% ; 33.33%
Step-by-step explanation:
1.)
Markup % = 11%
Purchase price = $45
Selling price will be :
(100 + 11)% * $45
1.11 * $45 = $49.95
2.)
Purchase price = $2.50
Selling price = $3.75
Markup % :
Profit / purchase price * 100%
[(3.75 - 2.50) / 2.50)] * 100%
1.25 / 2.50 * 100%
0.5 * 100% = 50%
3.)
Purchase price = $3.75
Selling price = $5.00
Markup % :
Profit / purchase price * 100%
[(5.00 - 3.75) / 3.75)] * 100%
1.25 / 3.75 * 100%
0.3333 * 100% = 33.33%
B. Subtract the following integers
16.9 - (-5) =
17. - 12 - ( + 8) =
18. 15 - 9=
19. - 5 - (-8)=
20. - 11 - ( + 14 ) =
Answer:
16. 9 - (-5) = 21.9
17. -12 - ( + 8) = -4
18. 15 - 9 = 6
19. -5 - (-8)= 3
20. -11 - ( + 14 ) = -25
Step-by-step explanation:
Subtracting a negative from another number is the same as adding the number. Thus, 16.9 - (-5) = 16.9 + 5.
Hope it helps <3 :)
Answer:
16.9-(-5)=21.9
17.-12-(+8)= -3
18.15-9=9.15
19.-5-(-8)=22
20.-11-(+14)=-5
The table shows values for functions f(x) and g(x)
What is the solution to f(x)=g(x) ?
Select each correct answer.
A. −3
B. −2
C. −1
D. 0
E. 1
F. 2
G. 3
Answer:
E) 1
Step-by-step explanation:
this is when both functions have the same value
Four coordinates A, B, C and D form a rectangle.
A = (2,8), B = (9, 2) and C'=(2, 2)
What are the coordinates of D?
Expresa el área del cuadrado interno con un polinomio,luego calcula el área
x = 4y y = 10.
Es para hoy ayudaaaaaa
Answer:
si me ayudas diciéndome de qué materia es y qué grado eres Y qué página es Con gusto te ayudo pero si no es de quinto grado página 83 y 82 del trimestre 1 de la guía tal vez no te lo pueda responder pero te envió una foto para que veas Sí sí es lo que estás buscando o no
Element X decays radioactively with a half life of 9 minutes. If there are 760 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 19 grams?
Answer:
Step-by-step explanation:
760·0.5^(t/9) = 19
0.5^(t/9) = 19/760
2^(-t/9) = 0.025
-t/9 = log₂(0.025)
t = -9log₂(0.025) = 47.9 minutes
Answer:
47.9 minutes
Step-by-step explanation:
pls help quickly maath
Answer:
It should be A
Step-by-step explanation:
Since it is asking for the squares to circles, it is not option c. B is also incorrect because the ratio is not correct, which leaves the only answer to be A.
Which step could you use to start solving the system of equations below?*
x + y = 3
-3x – 2y = -7
What is the area of this parallelogram
Answer:
B. 12.25
Step-by-step explanation:
A=bxh=3.5·3.5=12.25
Answer:
17.15
Step-by-step explanation:
There are 2 ways to solve this.
One way is this:
Add 1.4 and 3.5 together to get the total length of the parallelogram. The sum would be 4.9. Then multiply this number by the height of the figure(3.5cm). So that the product of 4.9 and 3.5 is 17.15.
The second way is this:
Find the area of the two triangles and the square and then add those products together. So add:
1.4 x 3.5 ÷21.4 x 3.5 ÷23.5 x 3.5So solve this equation and you will get:
2.45 + 2.45 + 12.25=17.15Find the distance between (-5,6)and (3,2).
Answer:
[tex]\displaystyle d = 4\sqrt{5}[/tex]
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightAlgebra I
Coordinates (x, y)Algebra II
Distance Formula: [tex]\displaystyle d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]Step-by-step explanation:
Step 1: Define
Point (-5, 6) → x₁ = -5, y₁ = 6
Point (3, 2) → x₂ = 3, y₂ = 2
Step 2: Find distance d
Simply plug in the 2 coordinates into the distance formula to find distance d
Substitute in points [Distance Formulas]: [tex]\displaystyle d = \sqrt{(3+5)^2+(2-6)^2}[/tex][Distance] [√Radical] (Parenthesis) Add/Subtract: [tex]\displaystyle d = \sqrt{(8)^2+(-4)^2}[/tex][Distance] [√Radical] Evaluate exponents: [tex]\displaystyle d = \sqrt{64+16}[/tex][Distance] [√Radical] Add: [tex]\displaystyle d = \sqrt{80}[/tex][Distance] [√Radical] Simplify: [tex]\displaystyle d = 4\sqrt{5}[/tex]Hi can someone please answer and explain all you work thank you! I’ll mark brainliest
Suppose that a sample is taken from a population whose mean value is 76.
As the sample size increases, the sample mean will approach which value?
Answer:
The sample mean will approach 76
Step-by-step explanation:
Refer to Law of large numbers (LLN) and the central limit theorem (CLT)
For random sample, with sample size n, in population with expected value μ, the sample mean converge almost surely to the expected value μ as n -> ∞
If f(x)=3x-1 find the following f(3) f(2)
Answer:
(4(f(2)
Step-by-step explanation:
If f(x(=3x-1 then f(3)f(2)
is 14.31 REPEATING at 31 irrational or rational
Answer:
rational
Step-by-step explanation:
it's an decimal from above
BRAINLIEST WILL GIVE
Answer:
Commutative
Step-by-step explanation:
because both sides contain 4.3 + g in any order.
Answer:
this is commutative Property of Addition because they are showing that even when you change the order, the sum will equal the same amount.
Step-by-step explanation:
I hope this helps! ^^
☁️☁️☁️☁️☁️☁️☁️☁️