Sara's score in the sixth test is 98.
HOW TO CALCULATE TOTAL FROM MEAN?The mean of a set of data can be calculated by dividing the total sum by the number of data given.
According to this question, Sara is said to have a mean score of 62 in 5 tests and another mean score of 68 in 6 tests.
First total score = 62 × 5 = 310Second total score = 68 × 6 = 408Therefore, Sara's score in the sixth test can be calculated by subtracting 310 from 408 to give 98.
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martin divides a shape into 3 equal parts. what unit fraction can he write to represent 1 part
1 part = 1/3
1/3 + 1/3 + 1/3 = 1
Answer:
1/3
Step-by-step explanation:
because all the sides and shapes are equal it would be 1/3as well as
1/3 + 1/3 +1/3=1
Hii I really need help determining the y intercept of the line.
So what's they?
X intercept is the co-ordinate where the line crosses x axis ,
Y intercept is the co-ordinate where the line crosses y axis
So
X intercept (-10,0)Y intercept (0,-45)what is the equation of the line that passes through (0,2) and has a slope of 0
Answer:
Step-by-step explanation:
The line with the slope 0 is horizontal line, so the equation is
y = 2
find the value of x
Answer:
116
Step-by-step explanation:
The sum of the measures of the angles of a quadrilateral is 360 degrees, so:
79+55+110+x=360
244+x=360
x=116
A regression was run to determine if there is a relationship between hours of TV watched per day (x) and number of situps a person can do (y). The results of the regression were: y=ax+b a=-0.761 b=20.501 r^2=0.643204 r=0.802 Use this to predict the number of situps a person who watches 2 hours of TV can do ( to one decimal place )
Answer:
The number of situps is approximately 19
Step-by-step explanation:
Regression Line
A regression line is a line that best fits any given dataset in terms of having the smallest overall distance from the line to the points.
Regression lines are useful to forecast the behavior of the dependent variable.
We are given the statistics related to determining if there is a relationship between hours of TV watched per day (x) and the number of situps a person can do (y).
The line is given as follows:
y=-0.761x+20.501
The rest of the parameters can only be used as a reference to evaluate how good the line approaches the dataset.
Now use the line to predict the number of situps a person who watches x=2 hours of TV can do:
y=-0.761*2+20.501
y=19
The number of situps is approximately 19
Which of the following decimals is equivalent to 5%?
A. 500
B. 5
C. 0.5
D. 0.05
Answer:
D
Step-by-step explanation:
0.05 is equivalent to 5%
Hope that helps!
The figure below has a perimeter of 20 cm. Jinaiya wants to scale this figure by a factor of 0.75
What will the perimeter of the scaled figure be?
Answer:
15cm
Step-by-step explanation:
scale factor =image diatace/object distance
0.75=x/20
0.75×20=x
15=x
: .x=15cm
4 = 2/9 (4y - 2)
solve and show work
Find the GCF of 12a^5 and 38a^4b^2.
Answer:
Procedures:
1.) The GCF of a number is the greatest factor/number that you can divide from all the numbers.
2.) The GCF of an exponent is the least value.
ANSWER: 12a² and 38a⁴b²
GCF = 2a²
Factored Form = 2a²(3+19a²b²)
Can you help me please
Step-by-step explanation:
4/5x-3=3/10x+7
We move all terms to the left:
4/5x-3-(3/10x+7)=0
Domain of the equation: 5x!=0
x!=0/5
x!=0
x∈R
Domain of the equation: 10x+7)!=0
x∈R
We get rid of parentheses
4/5x-3/10x-7-3=0
We calculate fractions
40x/50x^2+(-15x)/50x^2-7-3=0
We add all the numbers together, and all the variables
40x/50x^2+(-15x)/50x^2-10=0
We multiply all the terms by the denominator
40x+(-15x)-10*50x^2=0
Wy multiply elements
-500x^2+40x+(-15x)=0
We get rid of parentheses
-500x^2+40x-15x=0
We add all the numbers together, and all the variables
-500x^2+25x=0
a = -500; b = 25; c = 0;
Δ = b2-4ac
Δ = 252-4·(-500)·0
Δ = 625
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
x1=−b−Δ√2ax2=−b+Δ√2a
Δ−−√=625−−−√=25
x1=−b−Δ√2a=−(25)−252∗−500=−50−1000=1/20
x2=−b+Δ√2a=−(25)+252∗−500=0−1000=0
2. Solve for X. SHOW YOUR WORK.
(7x - 25)°
(4x + 2)°
Answer:
the answer is 9,
Step-by-step explanation:
i looked it up and passed my test with a 100
Between what two ten thousand 105,159 is between
Answer:
110,000
Step-by-step explanation:
If mzBEC = 140°, find mZFEG.
F.
G
CA
A
To
и в
B
O 80
090
50
40
Answer:
50° for angle FEG
Step-by-step explanation:
Following the Verticle Angles Theorem, the angle on the other side of 140 must also be 140. Since it is split up and we know one of them is a right angle, we must subtract 90 from 140.
140 - 90 = 50.
Thus, angle FEG is 50°.
Write the equation of the line that goes through (-2,4) and (2,8)
Find f(3) and interpret its meaning.
Answer:
f(3) = 425
f(3) is the elevation of a mountain climber after 3 hours of climbing.
Step-by-step explanation:
So we are given a line that relates time to elevation. We are also given that the equation of the line is f(x) = 125x + 50. From looking at the graph given, we can see that x is the time, in hours, and y, or f(x), is the height, in feet. We are asked to find f(3) and interpret it's meaning.
To find f(3), we would have to find what f(x) is when x = 3. To do this, lets plug in 3 for x into the given equation:
f(3) = 125(3) + 50 = 425
So f(3) = 425. Now, we already know that x is the time in hours and y, or f(x), is the elevation in feet. We set x to 3 when solving for f(3). We have also found that f(3), or y when x = 3, is 425. So f(3), or 425, is the elevation after 3 hours.
I hope you find my answer and explanation to be helpful. Happy studying.
Tia wrote a perfect square trinomial on the board, but a value is missing. Which of the following statements must be true?
Answer:
c
Step-by-step explanation:
i think it's C cause it shows you the 4×
The missing value in the given perfect square trinomial is 20. (option 2)
What is a perfect square trinomial?A perfect square trinomial is a trinomial that can be written as the square of a binomial.
Given that, Tia wrote a perfect square trinomial on the board, but a value is missing.
The trinomial is =
4x²+?+25
When comparing with (a+b)² = a²+b²+2ab
We get,
a² = 4x²
a = 2x
b² = 25
b = 5
We are asked to find, 2ab,
Therefore,
2ab = 2×2x×5
= 20x
Hence, the missing value in the given perfect square trinomial is 20.
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find the total of 2/8 and 2/3
Answer:
11/12 you have to find a common denominator first and that is 12
7. What is the precision of the measurement 4 quarts?
0.1 quarts
4 quarts
O 1 quart
O 10 quarts
what is the value of the expression below (8^1/2)^2
Answer:
8
Step-by-step explanation:
The square of a number square rooted is the number itself.
Plss help mee
you need to show your work
At the school's fall bake sale, all of the pies were cut into 6 pieces, so each person who bought a piece bought 1/6 of a pie. Each slice of pie sold for $1.00. How much money did the school make if all eleven pies were sold? (In other words, find 11 divided by 1/6 .)
Answer:
$66
explanation:
1/6 of a pie costs $1
11 divided 1/6
11 ÷ 1/6
11 * 6
$66
The school earned total: $66
Answer:
2 ⅓
Step-by-step explanation:
division is the same as a fraction
the dividend is the numerator and the divisor is the denominator
7÷3 is the same as 7/3
change 7/3 into a mixed number which is 2 ⅓
Help math math math ASAP pass
Answer:
(-1,1)
Step-by-step explanation:
you can solve them simultaneously or by just looking at the point at which the lines are meeting or intersecting
Answer:
(-1,1)
Step-by-step explanation:
Which conclusion can be drawn from the graph data?
Mexican cities have larger populations than US cities.
The third most-populous city shown on the graph is in Mexico.
The top three most-populous cities shown on the graph are US cities.
The population of New York City is more than double the population of Los Angeles.
Answer:D
Step-by-step explanation:
Answer:
D. The population of New York City is more than double the population of Los Angeles.
On a piece of paper, use a protractor to construct a triangle with angle measures of 100° and 30°.
Which statements about this triangle are true?
Select all correct answers.
The third angle measures 50°
The third angle measures 90°
The third angle measures 130°
All sides have different lengths.
Two sides have the same length,
The third angle measures 50° and all sides have different lengths.
What is a triangle?A triangle is a polygon with three sides and three angles. Types of triangles are isosceles, equilateral, scalene and right angled.
The sum of angles in a triangle is 180 degrees.
A triangle with angle measures of 100° and 30°, let x represent the third angle, hence:
x + 100 + 30 = 180° (sum of angles in a triangle)
x = 50°
Also, all sides have different lengths since all the angles are different.
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Answer:
The third angle measures 50°.
The third angle measures 50°.
Please help 50 points: A ball is thrown straight up, from 3 m above the ground, with a velocity of 14m/s. When does it hit the ground? Use vertical motion formula.
Answer:
3.058s
Step-by-step explanation:
i cant rewrite everything i solve in the paper sorry
Step-by-step explanation:
In this question, to find the total height first, we must also take into consideration the acceleration due to gravity as well. To find the distance by which acceleration due to gravity pulls the ball down must know the Initial velocity.
In the answer key, it says that gravity changes the ball's height by a distance of -5t^2
Is initial velocity in this question 0 or 14m/s? Because if it is 14, then gravity should change the balls position by -(14+5t^2), not -5t^2, because if I remember correctly, the formula for finding distance is vt(initial velocity)+(1/2)at^2 ,and not just (1/2)at^2
What would the answer be ?
I need help quickly please
Answer:
Step-by-step explanation:
What is the average rate of change of the function in the table at the interval x = -1 to x = 1?
Answer:
the answer is undefined
Step-by-step explanation:
If a function, f(x), is continuous (that is, has values for every x in the interval) from x=- 1 to x=1 ), then the average rate of change is:( total amount that f(x) changes ) / (total amount that x changes)( f(1) - f(-1) ) / ( (1) - (-1) )( f(1) - f(-1) ) / 2The variable x changes from (-1) to (1). That value is 2. [note: (1)-(-1) ]The function changes from f(-1) to f(1). You must determine f(1)-f(-1) and use that value as the numerator.Fill in the values to determine the average rate of change: ( f(1) - f(-1) ) / 2However, if the plot of y values is not a function, and there is some x value between -1 and 1 for which f(x) is undefined, then the rate of change of y from f(-1) to f(1) is also undefined.
7 1/6 - 62/5 = ?
O A. 45
O B. 145
O C. 1/5
O D. 1335
Answer:
-17/32
this is the answer I got
Mandy is trying to subtract 9 - 10, and she has asked you for help. How would you explain the process of solving the problem to Mandy, using an number line?
Which number below is a prime number?
a
O A. 76
B. 79
C. 100
D. 66
Answer:
79
Step-by-step explanation:
↓ Define Prime number ↓
Prime number ⇒ A positive integer that has no positive integer divisors other than 1 and itself. To prove whether a number is a prime number, first try dividing it by 2, and see if you get a whole number.
Solve:
76 is not a prime number. The number 76 is divisible by 1, 2, 4, 19, 38, 76.
79 is a prime number. The number 79 is divisible only by 1 and the number itself.
100 is not a prime number. The number 100 is divisible by 1, 2, 4, 5, 10, 20, 25, 50, 100.
66 is not a prime number. The number 66 is divisible by 1, 2, 3, 6, 11, 22, 33, 66.
Hence 79 is a prime number
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