need help for this question pls urgent
Here are the marks of a student in four exams.
65 80 76 69
The student takes a fifth exam.
His mean mark for the five exams is 70
Work out his mark in the fifth exam.
Answers
Answer:
61 marksStep-by-step explanation:
Given,
Marks of the four exams = 65, 80, 76, 68
Let the mark for the fifth exam be = x
Mean of the five exams = 70
Therefore,
By the problem,
[tex] = > \frac{65 + 80 + 76 + 68 + x}{5} = 70[/tex]
[tex] = > \frac{289 + x}{5} = 70[/tex]
=> 289 + x = 70 × 5
=> 289 + x = 350
=> x = 350 - 289
=> x = 61
Hence,
Marks of the fifth exam is 61 (Ans)
Related Questions
3x + 5 > 16
x is an integer.
Find the smallest value of x.
Answers
Answer:
4
Step-by-step explanation:
3x + 5 > 16
3x > 16 - 5
3x > 11
x > 11 / 3
x > 3.6666...
The smallest value would be 4.
Answer:
4
Step-by-step explanation:
Given
3x + 5 > 16 ( subtract 5 from both sides )
3x > 11 ( divide both sides by 3 )
x > [tex]\frac{11}{3}[/tex] , that is
x > 3 [tex]\frac{2}{3}[/tex]
If x is an integer then the smallest value of x is 4
Pleaseee help! HELP NEEDED ASAP!
Answers
6. y=-6x+360
B
A baby whale was born at the zoo. The baby
weighed 234.268 pounds. What is this number
rounded to the nearest hundredth?
a) 234.3
234:26
b) 234.26
c) 234.27
d) 234.268
Answers
Answer:
B I think hope it is right
You want to buy 7 tickets at that same rate. Explain the mathematical process you used to determine the cost of 7 tickets. (Include the unit rate in your explanation)
Answers
Answer:
7x
Step-by-step explanation:
To purchase 7 tickets at the same rate ;
Mathematically, Total Cost of an item is :
Cost = unit price * quantity
Here,
quantity = 7 tickets
Since price per ticket(rate) is the same ; then we can take rate as x
Hence, the cost of the 7 tickets is :
Quantity * rate
7 * x = 7x
Identify the slope of the graph below
Answers
Answer:
Positive
Step-by-step explanation:
Answer:
POSITIVE
Step-by-step explanation:
It's positive because the slope is rising like this /
If it was negative it would be declining like this \
hope that makes sense but I'm 1000% sure it's positive
can someone plsss help me
Answers
Answer:
The equation for charge is = current x times
Please help will give you brainliest
Answers
Answer:
14 ft squared
Step-by-step explanation:
Area is length x width so 7 x 2 = 14.
Hope this helps :D
I'm confused, I'm used to doing these problems with both coordinates :/
Answers
Answer:
{0, 1, 16, 81}
Step-by-step explanation:
If the domain of this function is the set {0, 1, 4, 9}, we find the set representing the range by evaluating the function at each of the four values in the domain.
f(0) = 0
f(1) = 1
f(4) = 16
f(9) = 81
and so the range is the set {0, 1, 16, 81}.
A local shelter is having an Adopt-a-thon for kittens and puppies. Kittens cost $50 to adopt and puppies are $75. The shelter made $1200 during the Adopt-a-thon event and adopted off twice as many puppies as kittens. Write and solve a system to find how many puppies and kittens were adopted
Answers
Answer:
Step-by-step explanation:
P=2K
50K+75P=1200, using P from above makes this equation become
50K+75(2K)=1200
50K+150K=1200
200K=1200
K=6, since P=2K
P=2(6)=12
So 12 puppies and 6 kittens were adopted.
Determine the approximate average rate of change in the number of tickets sold between the 3rd and 10th days after the release.
OA.
OB.
The number of tickets sold changed at an average rate of approximately -20 tickets per day.
The number of tickets sold changed at an average rate of approximately – 7 tickets per day.
The number of tickets sold changed at an average rate of approximately –10 tickets per day.
The number of tickets sold changed at an average rate of approximately –3 tickets per day.
Ос.
D.
Answers
Answer:
-3 Is the average rate
Step-by-step explanation:
The number of tickets sold changed at an average rate of approximately -20 tickets per day. The correct answer is option A.
What is the average rate of change?The average rate of change is the average amount by which the function changed per unit throughout that time period. It is calculated using the slope of the line linking the interval's ends on the graph of the function.
The rate of change is calculated by the formula below:-
Rate of change = Final value - initial value.
From the given graph the value of tickets on the 3rd day is 100 and on the 10th day is 80. The final value of tickets is 80 and the initial value is 100.
The average rate of change in the number of tickets sold between the 3rd and 10th days after the release will be calculated as below:-
Rate of change = Final value - initial value.
Rate of change = 80 - 100
Rate of change = -20
Therefore, the number of tickets sold changed at an average rate of approximately -20 tickets per day. The correct answer is option A.
To know more about the average rate of change follow
https://brainly.com/question/8728504
#SPJ2
What is the definition of a tangent in math
Answers
Answer:
In geometry, the tangent line (or simply tangent) to a plane curve at a given point is the straight line that "just touches" the curve at that point. Leibniz defined it as the line through a pair of infinitely close points on the curve. ... The word "tangent" comes from the Latin tangere, "to touch".
Step-by-step explanation:
A straight line touching a curve at a single point without crossing it there is tangent.
I need help
A line that includes the point (9, 10) has a slope of -1/9 what is its equation in point-slope
form?
Use the specified point in your equation. Write your answer using integers, proper fractions,
and improper fractions. Simplify all fractions.
Answers
Answer:
y -10 = -1/9 (x-9)
Step-by-step explanation:
Point slope form is
y-y1 = m (x-x1)
y -10 = -1/9 (x-9)
In ΔSTU, the measure of ∠U=90°, ST = 67 feet, and TU = 14 feet. Find the measure of ∠T to the nearest degree.
Answers
Answer:
78
Step-by-step explanation:
Answer:
78
Step-by-step explanation:
The sum of three consecutive even integers is 30 more than the largest
Answers
Answer:
nljgdetbeybrybdtbrbrtbetbrynrynenehtnehymyrumeymryjmryj ryu
Select the correct answer.
If you roll a single six-sided die, what is the probability of rolling an odd number?
A 1/6
B 1/3
C 1/2
D 3
Please help!
Answers
Answer: that means you have a 3/6 chance which can be simplified to 1/2
1, 3 and 5 are the odd numbers
Step-by-step explanation:
Answer:
the answer is c 1/2
Step-by-step explanation:
since there are 6 numbers on the die that range from 1-6, that means there are three odd numbers, so the probability would be 3/6, which can reduce to 1/2
Hi I need help please
Answers
Answer:
x = 9
Step-by-step explanation:
8x - 10 = 62
8x = 72
x = 9
solve for x
8x=62+10
8x=72
x=72/8
x=9
which statement is true about the extreme value the given quadratic equation? y = -3x^2 + 12x - 33 Oa. The equation has a maximum value with a y coordinate of -27 Ob. The equation has a minimum value with a y coordinate of -21 Oc. the equation has a minimum value with a y coordinate of -27 Od. The equation has a maximum value with a y coordinate of -21
Answers
Answer:
D. The equation has a maximum value with a y coordinate of -21Step-by-step explanation:
The quadratic equation has the extreme value at vertex with x-coordinate of
x = -b/2aFor the given equation the vertex is:
x = -12/2(-3) = 2The value of y at x = 2 is:
y = -3(2²) + 12(2) - 33 = -12 + 24 - 33 = -21Since the leading coefficient is negative, the extreme is the maximum for the given equation.
Correct choice is D
someone please do this for me... i will mark brainliest. all work needs to be shown. (picture shown above)
Answers
Step-by-step explanation:
just use step by step process so dum
A family charges a trip to the zoo on a credit card. The simple interest rate is 12%. The charges are paid after 3 months. What is the total amount paid for the trip? Round your answer to the nearest hundredth.
Answers
Answer:
$180.806
Step-by-step explanation:
The computation of the total amount paid for the trip is shown below;
As we know that
Simple interest = Principal × rate of interest × time period
= (67.70 + 62.34 + 45.50) × 12% × 3 months ÷ 12 months
= 5.2662
Now the amount is
= Principal + simple interest
= 175.54 + 5.2662
= $180.806
what si the slope of y=-5x+4x
Answers
Answer:
Use the slope-intercept form y=mx+b to find the slope m. m=−1
Step-by-step explanation:
lets take the x's away from: -5x+4x
That will be -5+4
-5+4=-1
Because remember:
When adding positive numbers, count to the right.
When adding negative numbers, count to the left.
When subtracting positive numbers, count to the left.
When subtracting negative numbers, count to the right.
I hope this helps. :)
Answer:
m= 4
Step-by-step explanation:
Rewrite the slope-intercept form
y = 4x - 5
the using the slope-intercept form, the slope-intercept is 4
sorry if this doesn't help
Sorry its long but ill give brainlist to the right one just look at the images and multiple choice parts
Answers
4x + 7 = ? (I'm not so good in math so please help)
Answers
Answer:
4(x+ 1.75)
Step-by-step explanation:
Answer: 4
i wish that helped
A recipe that makes 1 1/2 dozen cookies requires 3/4 cup of sugar. Shanika wants to make 6 dozen cookies. How many cups of sugar will she need
F. 1 1/8 cups
G. 4 cups
H. 6 3/4 cups
J. 3 cups
Answers
Answer:
h
Step-by-step explanation:
trust me js divide
Y= -6/5x-7 and y=2/5x+1
Answers
Answer:
x = -5
y = -1
Step-by-step explanation:
Y= -6/5x-7 and y=2/5x+1
then:
-6/5x - 7 = 2/5x + 1
simplify:
-8/5x = 8
divide both sides by 8:
-1/5x = 1
multiply both sides by 5:
-x = 5
x = -5
y = 2/5(-5) + 1 = -2 + 1 = -1
i can never understand these can someone help
Answers
Cross multiply.
15x=300
x=20
Therefore, the missing side is 20.
Simone runs the 100m in 12 seconds.Hanno covers 2.5 km in 4minutes with his bicycle who moves fastest?
Answers
Answer:
Hanno moves faster than Simone.
Step-by-step explanation:
Simone: 25x100=2500m or 2.5km in 25x12=300 seconds or 5 minutes
Hanno- 2.5 km in 4minutes
So, Hanno moves 1 minute faster.
Please mark as brainliest.
Max is asked to prove that LM=MN Here is hs proof.
This is not a correct proof explain why
Answers
Answer:
Its not true because:
Step-by-step explanation:
if you divide by M, with M not being 0, ypu have the equation L=N which is false
The Great Pyramid in Giza, Egypt is a square-based pyramid. It was constructed in 2056 BC out of lime stone. The length of one side of the base was 755 feet, it had a height of 481 feet and a slant height of 610 feet. About how much interior space did the Egyptians have to place the tombs and worship their beloved leaders?
Answers
Answer:
i think its 274,182,025 cubic feet
Step-by-step explanation:
.
A shark is swimming 25 feet below the surface of the water. It goes down another 12 feet. What is the new depth the shark is swimming at?
Answers
Answer:
37 feet below the surface or -37 ft
Step-by-step explanation:
A baker has 15 cups of flour. He sets aside 4 cups of flour, and uses the rest for a cookie recipe that calls for 1/2 cup of flour. How many batches of cookies can the baker make? pls help ana2928
Answers
15-4= 11
11 x2=22