Answer:
3 days
Step-by-step explanation:
Given that :
Today :
Study time for math = 15 minutes
Study time for science = 75 minutes
Subsequent days :
Study time for math = 50 minutes
Study time for science = 30 minutes
Let the number of days when study time for math and science will be the same = x
15 + 50x = 75 + 30x
50x - 30x = 75 - 15
20x = 60
x = 60 / 20
x = 3
3 days
a car can drive 165 miles in 5 hours. how many yards can thee car travel in a hour
Answer:
33
Step-by-step explanation:
because 165 divided by 5 is 33 and if you add 33 5 times it gives you 165
Answer:
58080 Yards
Step-by-step explanation:
165/5 = 33 miles an hour
33 miles an hour ~ 58080 yards an hour
a boat travels upstream for 108 miles in 4 hours, and returns in 3 hours traveling downstream in a river. What is the rate of the boat in still water, and what is the rate in the current?
Answer:
Rate in still water = 27 mph
Rate in the current =36 mph
Step-by-step explanation:
The rate is the speed the boat use to travel in the water
The distance travelled upstream = 108 miles
The time taken to travel upstream = 4 hours
The rate in still water /upstream = 108/4 = 27 mph
The rate in the current /downstream = 108/3 =36 mph
20x-3y = 4 and 3x -y = -5
Answer:
Step-by-step explanation:
3x-y=-5
y=3x+5
20x-3(3x+5)=4
20x-9x-15=4
11x=19
x=[tex]\frac{19}{11}[/tex]
y=3([tex]\frac{19}{11}[/tex])+5
y=[tex]\frac{112}{11}[/tex]
45°
V7
45°
Х
find the length of side x in simplest radical form with a rational denominator
Answer:
[tex]x = \sqrt{\frac{7}{2} }[/tex]
Step-by-step explanation:
Explanation
From given graph
AC = √7
Given angle ∝ = 45°
[tex]cos\alpha = \frac{adjacentside}{Opposite side}[/tex]
[tex]cos45 = \frac{x}{\sqrt{7} }[/tex]
[tex]\frac{1}{\sqrt{2} } = \frac{x}{\sqrt{7} }[/tex]
[tex]x = \frac{\sqrt{7} }{\sqrt{2} }[/tex]
[tex]x = \sqrt{\frac{7}{2} }[/tex]
x = 1.8708
2. Solve the equation.
x - 5(x - 1) = x - (2x - 3)
Answer:
=2/3
Step-by-step explanation:
Diego scored nine points less than Andre in the basketball team Noah scored twice as many points as Diego if Noah scored 10 points how many ponts did Andre score
Answer:
1..........................
Answer:
Andre scored 14 points.
Step-by-step explanation:
set up expressions with the info given:
Diego's points: a –9
Andre's points: 2d. and
n = 2d
Noah's points = 10
Use the expressions to set up equations to solve.
To find a, Andre's points, we can work backwards.
Substitute the 10 from the last expression for n in the equation n=2d, and solve for d:
10 = 2d. Divide both sides by 2
5 = d
Substitute the value of d, Diego's points, to make an equation using the first expression:
5 = a –9 Add 9 to both sides.
5 + 9 = a a = 14
Andre scored 14 points
HELP PLEASE ASAP!!!!!!!
Im Ms.Barclay classroom 2/3 of the students play sodoku, 3/8 also play checkers. If there are 24 students in her class, how many play sodoku and checkers?
[tex]\frac{3}{8}(24)=\boxed{9}[/tex]
A total of 6 students play sudoku and checkers both.
How to form an equation?Determine the known quantities and designate the unknown quantity as a variable while trying to set up or construct a linear equation to fit a real-world application.
In other words, an equation is a set of variables that are constrained through a situation or case.
Given that,
Number of students = 24
Fraction who plays checkers = 2/3
So,
⇒ 2/3 × 24 = 16 students.
Now,
3/8 fraction of students(out of this 16) also play sudoku
So,
3/8 × 16 = 6 students.
Hence "A total of 6 students play sudoku and checkers both".
For more about the equation,
https://brainly.com/question/10413253
#SPJ2
The given question is incorrect,the correct question is ;
In Mr. Barclay's classroom, 2/3 of the students play checkers. Of the students who play checkers 3/8, also play sudoku. If there are 24 students in his class, how many play checkers and sudoku? There is/are a student(s) who play both checkers and sudoku
Four of our eight planets are gas giants.
The rest are made of rock. What fraction
of our planets are gas giants?
Answer:
half of them 50% .5 4/8 1/2
Answer:
4/8 or 1/2 or 50%
Step-by-step explanation:
According to your info in the question:
4 planets are gas giants.
8 total planets.
4 / 8 simplified is 1/2
A new ice skating rink will be approximately rectangular in shape and will have an area of 19,720 square feet. Using an equation for the perimeter P, of the skating rink in terms of its width W, what are the dimensions of the skating rink if the perimeter is 634 feet?
The dimensions of the rink are ? feet by ? feet.
Answer:
The dimension is: 232ft by 85ft
Step-by-step explanation:
Given
Shape: Rectangle
[tex]A = 19720[/tex] --- Area
[tex]P = 634[/tex] --- Perimeter
Required
Determine the dimension
Area is calculated as:
[tex]A = L * W[/tex]
This gives
[tex]19720 = L * W[/tex]
Perimeter is calculated as:
[tex]P = 2(L + W)[/tex]
This gives
[tex]634 = 2(L + W)[/tex]
Divide both sides by 2
[tex]317 = L + W[/tex]
Make L the subject
[tex]L = 317 -W[/tex]
Substitute 317 - W for L in [tex]19720 = L * W[/tex]
[tex]19720 = (317 - W)*W[/tex]
Open brackets
[tex]19720 = 317W - W^2[/tex]
Rewrite as:
[tex]W^2 - 317W + 19720 = 0[/tex]
Expand
[tex]W^2 -232W - 85W + 19720 = 0[/tex]
Factorize:
[tex]W(W -232) - 85(W - 232)= 0[/tex]
[tex](W - 85) (W - 232)= 0[/tex]
Split
[tex]W = 85\ or\ W = 232[/tex]
Recall that:
[tex]L = 317 -W[/tex]
[tex]L= 317 - 85\ or\ L = 317 - 232[/tex]
[tex]L= 232\ or\ L = 85[/tex]
Hence, the dimension is: 232ft by 85ft
The dimension of the rectangular rink is 85ft by 232ft
Perimeter and Areas of triangleGiven the following parameters
Area = 19,720 square feet.Perimeter = 634 feetThe formula for finding the area is:
A = lw
lw = 19,720
l = 19,720/w
If the perimeter is 634 feet
2(l+w) = 634
2(19,720/w + w) = 634
39,440/w + 2w = 634
39,440 + 2w^2 = 634w
2w^2 - 634w + 39,440 = 0
On factorizing, w=85 or w=232
Since l = 19,720/w
l = 19,720/232
l = 85
Hence the dimension of the rectangular rink is 85ft by 232ft
Learn more on area of triangle here: https://brainly.com/question/17335144
identify the quadrant that the following points are located at: A (-4 , 3) B (-5 , - 5) C (2, 8) D (8, -9) E (0,8) F (7,0)
Answer:
a. quadrant II
b. quadrant III
c. quadrant I
d. quadrant IV
e. y axis
f. x axis
Step-by-step explanation:
Will mark brainlist please help!!!!
Answer:
f(-3)= -8
f(2) = 4
Step-by-step explanation:
The first equation x ≤ 0 means that if the variable x, or in our case, -3, is less than or equal to 0, the answer will be calculated into the equation.
3(-3) + 1 = -8
The bottom equation x ≥ 2 means that if the variable, x, or in our case, 2 is more than or equal to 2, the answer is 4. Since 2 is equal to 2, the answer would then be 4.
A deck of cards is shuffled and then divided into two halves of 26 cards each. A card is drawn from one of the halves; it turns out to be an ace. The ace is then placed in the second half-deck. The half is then shuffled, and a card is drawn from it. Compute the probability that this drawn card is an ace. Hint: Condition on whether or not the interchanged card is selected.
Answer:
[tex]\frac{3}{52}[/tex]
Step-by-step explanation:
Hope this helps! Ask me anything if you have any questions! I'm free to help you anytime!
An engineer designed a valve that will regulate water pressure on an automobile engine. The engineer designed the valve such that it would produce a mean pressure of 5.0 pounds/square inch. It is believed that the valve performs above the specifications. The valve was tested on 6 engines and the mean pressure was 5.4 pounds/square inch with a standard deviation of 0.7. A level of significance of 0.025 will be used. Assume the population distribution is approximately normal. Determine the decision rule for rejecting the null hypothesis. Round your answer to three decimal places.
Answer:
Do no reject null hypothesis.
Conclusion:
there is no sufficient statistical evidence at 0.025 level of significance to support the claim.
Step-by-step explanation:
Given that;
mean x" = 5.4
standard deviation σ = 0.7
n = 6
Null hypothesis H₀ : μ = 5.0
Alternative hypothesis H₁ : μ > 5.0
∝ = 0.025
now,
t = ( 5.4 - 5.0) / ( 0.7/√6) = 0.4 / 0.2857 = 1.4
degree of freedom df = n-1 = 6 - 1 = 5
T critical = 2.571
Therefore; t < T critical,
Do no reject null hypothesis.
Conclusion:
there is no sufficient statistical evidence at 0.025 level of significance to support the claim.
The area of my back yard is 56sq feet the width of my backyard is 7 feet what is the length ?
Answer:
8 feet
Step-by-step explanation:
56/7= 8. hope this helps!
Max walks 10 meters in 4 seconds what is his walking rate in meters per second?
Answer:
2.5 meters per second.
Step-by-step explanation:
[tex]\frac{\text{meters}}{\text{seconds}}=\frac{10}{4}=\frac{10/4}{4/4}=\boxed{\frac{2.5}{1}}[/tex]
Max's walking rate should be 2.5 meters per second.
Hope this helps.
Answer:
2.5 meter
You have to do 10÷4 wich is 2.5 and thats your awnser!
4.) What is the better buy?:
$5 for 8 pens
OR
$32.50 for 50
pens?
Show your work.
Answer:
$5 for 8 pens
Step-by-step explanation:
0.625 times 8= 5 dollars
0.625 times 50= 31.25
which is way cheaper
Answer:
5 for 8 pens
Step-by-step explanation:
I did it on a paper.
Lol
HELPPPPPPPPPPPPPPPPPPP
Answer:
simple.
Step-by-step explanation:
If you know the angle of a straight line, its 180. first, subtract 180-135. this wqould be 45. therefore, the interior angle is 45. We know that a triangles area always adds to 180, so it would be 45+x+74=180. this would be x=61. to check, add the same thing, 45+74, but instead of x add 61.
Given that 9x–4y = 20. Find y when x= -2
What’s the answer pls
Answer:
25%
Step-by-step explanation:
The order of transformations in a sequence matters; reversing the order will not necessarily give the same image. Is this statement True of False?
Answer:
False
If the transformations include a reflection, then the orientation will change. A translation or rotation will preserve the original orientation
Solve for X. what are the measures of the two smaller angles? show your work
will mark brainiest for work
Answer:
x=10
Step-by-step explanation:
right angle is always 90
we can add 4+6=10
90-10=80
3*x+5*x=8*x
8*x=80
divide both sides by eight
x=10
Emmanuel brews a full pot of coffee every morning. The pot makes 12 cups
of coffee in 4 minutes. How many cups of coffee does it make per minute?
O 3 minutes/cup
O 333 cups/minute
О O
3 cups/minute
O .333 minutes/cup
‼️‼️‼️‼️‼️‼️‼️‼️HELPPPPPPPP NOWWWW and any other questions on my page recently ill mark you brainliest
Answer:
A) t(x)=948(0.955)^x
Step-by-step explanation:
The key term here is decreases by. This means there's going to be exponential decay. The exponential decay factor, r, in this case, will be r=1-0.045=0.955 and we also know this is exponential decay because r<1. The only possible option that works is A because when x=0 the result should be $948 because only 0 years have passed!
A U.S. Senator from Indiana wanted to know what all her constituents thought about the Clean Air Act that was coming up for a vote in the Senate. She sent a letter to a sample of 257 Indiana voters asking them if they supported the Clean Air Act even if it meant they would have to pay higher prices for gasoline. The results indicated that 39% of the sample supported the Clean Air Act, even if it meant higher gasoline prices. The sample of Indiana voters was intended to represent all Indiana voters; therefore, the value of 39% would be called __________.
Answer:
The value of 39% would be called parameter.
Step-by-step explanation:
When a percentage refers to a sample, it is called a statistic.
When it refers to a population, it is called a parameter.
The sample of Indiana voters was intended to represent all Indiana voters;
This means that the percentage will be used with the following meaning:
"39% of all Indiana voters ..."
That is, referring to the entire population(in this case, all Indiana voters), so would be a parameter.
Simplify
(5i²+8i+10) - (3i²-10i+3)
Answer:
2i^2+18i+7
Step-by-step explanation:
(5i^2+8i+10)-(3i^2-10i+3)
5i^2+8i+10-3i^2+10i-3
2i^2+18i+7
Five units to the right of -6
Answer: -1
Step-by-step explanation:
The stem-and-leaf display below gives the fuel efficiencies (in miles per gallon) for a sample of new cars. Use the display to answer the questions that follow.
Fuel efficiency (miles per gallon)
1 3
2 3 9
3 1 1 6 7
4 3 4 5 6
5 1 3 3 8
Key: 1/3 means a fuel efficiency of 13 miles per gallon.
A) What is the lowest fuel efficiency in the 30 0s?
B) What is the lowest fuel efficiency in the sample overall?
C) How many cars in the sample have fuel efficiencies in the 40s?
Answer:31
Step-by-step explanation:
59=64
(a) The lowest fuel efficiency in 30's is 31
(b) The lowest fuel efficiency in the overall sample is 13
(c) There are 4 cars in the sample that have fuel efficiencies in 40's
Given :
Stem and leaf display of data
Fuel efficiency (miles per gallon)
1 3
2 3 9
3 1 1 6 7
4 3 4 5 6
5 1 3 3 8
Explanation :
(A) We need to find the lowest fuel efficiency in 30's
So we look at the data's in third row
It shows the fuel efficiency of 31,31,36,37 miles per gallon
The lowest fuel efficiency in 30's is 31
(B) Lets write the fuel efficiency from the given table
13, 23, 29, 31,31,36, 37, 43, 44, 45, 46, 51, 53, 53, 58
The lowest fuel efficiency in the overall sample is 13
(C) Lets write the fuel efficiency of 40's
43, 44, 45, 46
So, there are 4 cars in the sample that have fuel efficiencies in 40's
Learn more : brainly.com/question/19228281
On Saturday, Ms. Rivera went to the store with $50. She needed to get clothes for the gym. She bought 5 pairs of socks for $3 dollars each, then paid $25 for shorts. Thankfully, Ms. Rivera had a coupon for half off everything! How much money did Ms. Rivera go home with?
Answer:
20
Step-by-step explanation:
She bought 5 pairs of socks which are 3 dollars each
(5 times 3 = 15 )
With the 25 dollar shorts
( 25 + 15 = 40 )
with a coupon of half off
( 40 divided by 2 = 20)
an area of 6 yards is equal to 54 square feet. 9 square yards is equal to how many square feet? explain or show your reasoning
Answer:
81 squared feet
Step-by-step explanation: