A man is three times as old as his son.In ten years time their combined ages will be 68 How old is each person
Answer:
22
Step-by-step explanation:
is 22 because 3 times 22 ut maie us 68
Answer:
Let Dad = Y, Son = X
Mathematically, from your statement:
Y = 3X, and (Y+10) + (X+10) = 68
Solving for X in 2nd equation, X = 48-Y
Insert this into first equation and solve for Y:
Y = 3(48-Y)
Y= 144 - 3Y
4Y = 144
Y = 36
Now, solve for X using either equation. I rearranged the 1st equation for X:
X = Y/3
X = 36/3 = 12
The boy is 12 and the dad is 36
Step-by-step explanation:
Hope this helps u
Crown me as brainliest:)
An experiment was conducted to evaluate the success of a methicillin-resistant Staphylococcus aureus (MRSA) vaccine. MRSA can be prevented if subjects
regularly wash their hands. The subjects were treated, but only some of the vaccines were successful. The researchers are unsure whether this was a result of hand washing or the vaccine alone. What is this an example of?
A. Confounding
B. The placebo effect
C. Blinding
D. Replication
E. Bias
Answer:
a
Confounding
Step-by-step explanation:
There are two variables that could have lead it being successful, thus the variables are confounding.
Mr. Mobley plans to have granite countertops installed in his kitchen. Granite Guys charges $75 per square foot of granite with an additional $200 service fee. Stoneworks charges $75 per square foot of granite. Which of the following statements is true?
The pricing at Granite Guys is proportional because it is more expensive option.
The pricing at Granite Guys is proportional because it is more expensive option.
The pricing at Granite Guys is non- proportional because of the additional service fee.
The pricing at Granite Guys is non- proportional because of the additional service fee.
The pricing at Stoneworks is non-proportional because the y-intercept is 0.
The pricing at Stoneworks is non-proportional because the y-intercept is 0.
7) -129 = 7(-7 - 4v) + 8v
Answer:
v = 4
Step-by-step explanation:
-129 = 7(-7 -4v) + 8v
-129 = -49 - 28v + 8v
-129+49=-20v
-20v = -80
20v = 80
v = 4
Answer:
v=4
Step-by-step explanation:
1) distribute
-129= -49 - 28v + 8v
2) Add like terms
-129= -49 - 20v
3)Isolate
-80= -20v
4)Divide
v=4
Find the slope of the line passing through the points (-4, -3) and (8,-9).
Answer:
cool.Step-by-step explanation:
What is a proportion
Answer:
a part, share, or number considered in comparative relation to a whole.
Example:A rope's length and weight are in proportion. When 20m of rope weighs 1kg, then: 40m of that rope weighs 2kg. 200m of that rope weighs 10kg.
7. The mean width of 12 iPads is 5.1 inches. The mean width of 8 Kindles is 4.8 inches.
a. What is the total width of the iPads?
b. What is the total width of the Kindles?
c. What is the mean width of the 12 iPads and 8 Kindles
Answer:
Width of the 12 ipads and 8 kindles is 4.98 inches
so I think it C
Step-by-step explanation:
IT C i hink but I'm not fully sure but i did the math and that what i got
Find ∆x and ∆y for the points (7, -2) and (9,-7)
There were 120 entries for the Rogers County Library annual writing competition, and 12 of them were picked to be published. What percent of the entries were picked to be published
Answer:
10%
Step-by-step explanation:
In order to calculate the percentage of the entries that were picked we need to divide the number of picked entries to be published by the total number of entries that were received during the competition like so...
12 / 120 = 0.1
Now we simply multiply this value by 100 in order to turn this into a percentage value
0.1 * 100 = 10%
Therefore, we can now see that only 10% of the total entries were picked to be published.
Please help ASAP thank u
7 is GF, WX
8 is DZ, XY
Question 2: The value of a motorcycle was £14000 on 1st April 2014.
Every three months the value of the motorcycle decreases by 2% of its value at
the start of that three months.
What was the value of the motorcycle on 1st April 2016?
Question 3: When a ball is dropped, it bounces and then rises.
The ball rises to 90% of the height from which it is dropped.
The ball is dropped from a height of 4m.
(a) Calculate the height of the rise after the first bounce.
(b) Calculate the height of the rise after the second bounce.
The ball carries on bouncing, each time rising to 90% of the last rise.
(C) For how many bounces does it rise to height greater than 1m?
Question 4: The population of a country is increasing by 5% a year.
How many years will it take the population of the country to double?
Question 5: Raheem and Ben invest money in 2010.
Raheem invests £1000 at Banks'R'us, who pay 3% interest per year.
Ben invests £1400 at Bank World, who pay 1% interest per year
In which year will Raheem's investment be worth more than Ben's?
Question 6: The population of a country increases by x% each year.
In 2014 the population of the country was 24,000,000.
Three years later, the population was 26,996,736.
Find x.
Question 7: Charlotte invests £5000.
The bank pays 10% interest for the first year and then y% every year after that.
After three years, Charlotte has £5610.55
Calculate y.
Answer:
Question 2: £11910.68
Question 3: (a) 3.6m (b) 3.24m (c) 13 bounces
Question 4: 15 years
Question 5: 2028
Question 6: 4%
Question 7: 1%
Solve for x. please give me the right answer
Answer: 55 or 65 I am not quite sure.
Step-by-step explanation:
Mary brought $20 to the skating rink. She paid $5.50 admission and $3.75 to rent skates. She also purchased two bottles of water for $1.25 each, and a snack for $2.75. Which expression can be used to determine how much money Mary has left? How much money does Mary have left?
Answer:
Amount left = $5.5
Step-by-step explanation:
Given:
Total amount = $20
Spend for admission = $5.50
Spend for rent = $3.75
Spend for 2 bottle = $1.25 each
Spend for snack = $2.75
Find:
Amount left
Computation:
Amount left = Total amount - Spend for admission - Spend for rent - Spend for 2 bottle - Spend for snack
Amount left = $20 - $5.5 - $3.75 - 2($1.25) - 2.75
Amount left = $5.5
Answer:
Amount left = $5.5
Step-by-step explanation:
7y+3(2+__y)
Fill in they blank if it is simplified to 13y+6
a. -2
b. 6
c. 2
d. 5
Solve the following basic one step equation:x12=3
Answer:
x=1/4
Step-by-step explanation:
x12=3 (I would treat it as 12x=3 since the 12 is still attached with multiplication)
x=3/12 (simplify your fraction)
x=1/4
The price of a technology stock was $9.65 yesterday. Today, the price fell to $9.52. Find the percentage decrease. Round your answer to the nearest tenth of a percent.
Answer:
(9.52/9.65)×100 = 98.65
your 100% value decreased to 98.65
net percentage decrease: 100-98..65
=1.347 or 1.35 (rounded)
quickly answer this please!!!
Answer:
$43.77
Step-by-step explanation:
(58.36)(.75)
43.77
Answer:
$43.77
Step-by-step explanation:
Because 3/4 is just 3 divided by 4, we can divide 58.36 by 4 and multiply that by three.
We get: [tex]\frac{58.36}{4}[/tex]×3, or 14.59×3
From this, we get $43.77
in a survey of 600 adults , 15 % did not know how to ride a bike. how many people can ride a bike? plz I don't really understand this thank u for answering the question SHOW UR WORKING OUT
Answer:
510
Step-by-step explanation:
510 adults can ride a bike out of 600.
We can do this by first taking 15% of 600. To calculate 15% of 600, simply divide the percent (in this case, 15) by 100 and multiply by the number (600). For example, 15 ÷ 100 x 600 = 90, which means the same as 0.15 x 600 = 90.
Now that we know how many adults can't ride a bike, we take 600 and subtract that number from it. So, 600 - 90 = 510, which is how many adults can ride a bike.
Hope this helped! :)
A circles circumference is approximately 44cm. 1. The Circles area is approximately___ cm2. Enter a numerical value and round to the nearest tenths
Answer:
154
Step-by-step explaination
7/2 =49 49x3.14 pi = 154
y=7x-4
- 14x+2y=-8
Is it a solution?
Answer: No it is not a solution
Step-by-step explanation:
-14x-2=28
2x5=10
28+10=38
Uh can anybody help with thi
Answer: She can buy 35 apples, if she only buys apples
Step-by-step explanation: Divide $10 by $0.28 and you get 35.7, don’t round up because she won’t have enough money to pay for the last apple
hope this helps :)
Answer:
$9.8 for 35 apples.
Step-by-step explanation:
I know this because she is spending $9.86 on oranges on apples she would spend $9.8 on apples therefor she bought 35 apples.
30 POINTS! HELP ME PLZZ I NEED HELP WITH THIS!
Answer:
D.
Step-by-step explanation:
The correct answer is D because it is equivalent to the original expression. Instead of distributing the 6 twice, it is placed in parenthesis. The other choices are wrong, I tried them, did not yield the same answer.
Answer this for brainliest
Answer: If my math was correct I'm so sorry if it isn't, it should be P' = (0, -1) <3
Step-by-step explanation:
P' = (x - 6, y - 1)
P' = ((6) - 6, (0) - 1)
P' = (0, -1)
<3
P.s Love the pfp ;3
Beth had 1 yard of ribbon. She used 1_ 3 yard for a project. She wants to divide the rest of the ribbon into 1_ 6 yard pieces. How many 1_ 6 yard pieces of ribbon can she make? Explain your solution.
Given:
Total ribbon beth had = 1 yard
Ribbon used for project = [tex]\dfrac{1}{3}[/tex] yard
She wants to divide the rest of the ribbon into [tex]\dfrac{1}{6}[/tex] yard pieces.
To find:
The number of [tex]\dfrac{1}{6}[/tex] yard pieces of ribbon she can make.
Solution:
Total ribbon beth had = 1 yard
Ribbon used for project = [tex]\dfrac{1}{3}[/tex] yard
Remaining ribbon is
[tex]1-\dfrac{1}{3}=\dfrac{2}{3}[/tex]
She wants to divide the rest of the ribbon into [tex]\dfrac{1}{6}[/tex] yard pieces.
Let the number of [tex]\dfrac{1}{6}[/tex] yard pieces of ribbon she can make be x.
[tex]\dfrac{1}{6}x=\dfrac{2}{3}[/tex]
Multiply both sides by 6.
[tex]\dfrac{1}{6}x\times 6=\dfrac{2}{3}\times 6[/tex]
[tex]x=2\times 2[/tex]
[tex]x=4[/tex]
Therefore, number of [tex]\dfrac{1}{6}[/tex] yard pieces of ribbon she can make is 4.
Max is going to borrow money to buy a TV. For one TV he must pay back $438 in 12 months. For the other TV, he must pay back $555 in 15 months. Which TV has lower monthly payments? Explain how you know
Step-by-step explanation:
"Max is going to borrow money to buy a TV. For one TV he must pay back $438 in 12 months. For the other TV, he must pay back $555 in 15 months. Which TV has lower monthly payments? Explain how you know"
let us solve for the monthly payment expected in both cases
given data
amount= $438
time =12 months
monthly pay = 438/12
monthly pay = $36.5 per month
given data
amount= $555
time =15 months
monthly pay = 555/15
monthly pay = $37 per month
Therefore the First plan which is $438 in 12 months has lower monthly payments because Max will pay $36.5 monthly, the second plan is $0.5 more which is $37
The following information is known about a savings account.
Time = 6 years
Interest rate = 1.9%
Principal = $850
What amount of simple interest will be earned?
A. $16.15
B. $96.90
C. $946.90
D. $9,690.00
Answer:
C.$946.90
Step-by-step explanation:
S.I = 850×1.9×6÷100= $946.90
Answer:
I=prt
I=850×0.019×6
I=96.90
Step-by-step explanation:
Put the following equation of a line into slope-intercept form, simplifying all fractions.
4x+4y= 16
Answer:
y=-x+4
Step-by-step explanation:
Answer: y= x+4
Step-by-step explanation:
Sarah and her children went into a movie theater where they sell bags of popcorn for $7.50 each and drinks for $4.50 each. Sarah has $90 to spend and must buy a minimum of 16 bags of popcorn and drinks altogether. If xx represents the number of bags of popcorn purchased and yy represents the number of drinks purchased, write and solve a system of inequalities graphically and determine one possible solution.
Answer:is there any choices?
Step-by-step explanation:
please help!!! thank you
Answer:
WX = 18
Step-by-step explanation:
This is just a simple 1:2 congruency.
We know that because side FD is equal to 7 and side XY is equal to 14.
7:14 is the same as 1:2.
Using that logic we can then apply it to side FE.
Multiply 9 by 2 and you'll get your answer of WX = 18.
POSSIBLE PONS
Paul is p years old and Susan, s, is five more than two times Paul's age. Which
equation best represents Susan's age?
A S = (5 + 2)p
Bp = 25 + 5
C S = 2p + 5
D p = (5 + 2)s
Net
Answer:
C - S= 2p + 5
Step-by-step explanation:
So this is what we have:
Paul's age : p
Susan's age: s
S is 5 more than two timess of Paul's age meaning that her age is 5 plus 2 of Paul's age thus:
Susan's age = 2p + 5
HOPE THIS HELPED