Answer: 56 kids
Step-by-step explanation: 70 * 0.2 = 14 70 - 14 = 56
Last year we tested 70 kids on Unit 8 and this year we tested 20% less kids then we tested 56 kids on Unit 8 this year.
What is Percentage?percentage, a relative value indicating hundredth parts of any quantity.
If we tested 20% less kids this year, it means we tested only 80% of the number of kids we tested last year.
To find out how many kids we tested this year, we can use the following equation:
number of kids tested this year = 0.8 × number of kids tested last year
Substituting the given values, we get:
number of kids tested this year = 0.8 × 70
number of kids tested this year = 56
Therefore, we tested 56 kids on Unit 8 this year.
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Given ABCD is a trapezoid ad=10 bc=8 ck is altititude of abc=30
find area if abcd
The area of the given trapezoid ABCD in the image shown is calculated as: 54 units²
What is the Area of a Trapezoid?Area of a trapezoid = 1/2(a + b)h.
Given the following:
Area of triangle ACD = 1/2(AD)(CK) = 30 units²
1/2(10)(CK) = 30 units²
5(CK) = 30
CK = 6 units (altitude of trapezoid ABCD)
Area of the trapezoid = 1/2(a + b)h = 1/2(10 + 8)6
Area of the trapezoid = 54 units²
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Write the product using exponents.
An exponent is the number of times something is multiplied by itself
Answer: (1/5)^2 * x^3
To determine whether students
want a new school mascot, Abby
surveys every 25th student from an
alphabetized list of students in the
school. Will the survey results from
this sample support a valid inference?
Explain.
Using sampling concepts, it is found that the sample would not support a valid inference, as both alphabetized and non-alphabetized students should be sampled.
What is sampling?It is a common statistics practice, when we want to study something from a population, we find a sample of this population, which is a group containing elements of a population. A sample has to be representative of the population, that is, it has to involve all segments of the population.
The school has both alphabetized and non-alphabetized students, and both groups should be sampled for a valid inference to be made. Since only alphabetized students are sampled, the sample would not support a valid inference.
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what’s the area and perimeter for this problem?
Answer:
0.71 m²
Step-by-step explanation:
Area of triangle:base = b = 0.75 m
altitude= h = 1.9 m
[tex]\boxed{\text{\bf Area of triangle = $\dfrac{1}{2}b*h$}}[/tex]
[tex]\sf = \dfrac{1}{2}*0.75*1.9\\\\ =0.7125\\\\ = 0.71 \ m^2[/tex]
20 POINTS!!! HELP QUICK
Find the volume of this compound figure.
Hint: Half a sphere and a cylinder
Use 3.14 for pi!
The volume of the given shape will be equal to V=2827.42 cubic inches.
What is volume?The volume is defined as the space occupied by the object in the three-dimensional plane. It requires three coordinates to find the volume of any object.
Here it is given in the question that:-
Radius of the semicircle=12 inches
Height of the cylinder =13 inches.
Now the volume will be calculated as:-
Total volume of the figure will be the sum of the Volume of the semicircle and the Volume of the cylinder.
= 2πr³+πr²l
= 2xπx(6)³+πx(6)²x13
=1357.16+1470.26
=2827.42 Cubic inches
Hence the volume of the given shape will be equal to V=2827.42 cubic inches.
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What is the volume of the rectangular prism?
94.5 yd3
58.0 yd3
25.5 yd3
20.5 yd3
Answer:
94.5yd³
Step-by-step explanation:
volume = length × width × height
length = 7 yd , width = 4.5 yd and height = 3 yd
so volume = 7 × 4.5 × 3 = 94.5yd³
helppppppppp asa-pppppppppppppppppp-
Answer:
I got the mean of A is 6 and the mean of b is 3.5
Step-by-step explanation:
If correct i dont mind brainlest
Find the surface area of the pyramid.
Answer:
the surface area would be 353 in for the pyramid
Step-by-step explanation:
Richard Henry takes out $25,000 of ordinary whole life when he is forty-three years old. A. Annual premium b. Semiannual premium
If Richard Henry takes out $25,000 of ordinary whole life when he is forty-three years old is: A. Annual premium.
What is annual premium?Annual premium can be defined as the premium amount a person pay per year, yearly or annually.
Based on the scenario the whole life is an example of long term insurance.
Reason been that annual premium are often used for long term insurance in which the policy holder is expected to stop paying the premium when he/she reach a certain age that is stated on the policy terms and condition.
Therefore If Richard Henry takes out $25,000 of ordinary whole life when he is forty-three years old is: A. Annual premium.
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Answer:
618.25-annual 309.13-semiannual
Step-by-step explanation:
oddesy
PLEASE HELP URGENT 30 POINTS
What transformation maps a circle with radius r onto a congruent circle with radius s and the same center?
Answer:
C
Step-by-step explanation:
Because xyx-x=483=s739
x,y=rx,ry
Which graph represents the system of equations?
y = -2x + 1
y =-2x^2+1
Answer:
(0,1) (1,-1)
Second graph on top row is your answer.
Step-by-step explanation:
PLEASE HELP ME!!!
Identify the factors of x^2-4x-13
(x+4)(x-3)
(x-4)(x+3)
(x-2)(x+6)
(x+2)(x-6)
Answer:
The expression is not factorable with rational numbers.
Except if you made a typo in your equation and it's x^2-4x-12
calculation:
-6x2=12
-6+2=-4
Then the answer will be (x+2)(x-6)
The Phythagorean Theorem is
Answer: False
Step-by-step explanation:
The Pythagorean Theorem is [tex]a^2+b^2=c^2[/tex]
Answer:
false
Step-by-step explanation:
a2 + b2 = c2
Factor the algebraic expression.
32a+28
Answer:
The answer is: 4(8a+7) I think...
Have a nice day
help me thank you please help
Answer:
I think 2 but sorry if I'm wrong
Step-by-step explanation:
On a coordinate plane, parallelogram k l m n shown. point k is at (7, 7), point l is at (5, 3), point m is at (1, 1), and point n is at (3, 5). which statement proves that parallelogram klmn is a rhombus? the midpoint of both diagonals is (4, 4). the length of km is startroot 72 endroot and the length of nl is startroot 8 endroot. the slopes of lm and kn are both one-half and nk = ml = startroot 20 endroot. the slope of km is 1 and the slope of nl is –1.
The statement that proves that parallelogram KLMN is a rhombus is. The slope of KM is 1 and the slope of NL is –1.
What is a Rhombus?
This is a type of quadrilateral that has four sides of which they are all equal.
Hence, given that KLMN is a parallelogram, K(7,7), L(5,3), M(1,1) and N(3,5).
We know that they bisect each other and if the diagonals of a parallelogram are perpendicular to each other then the parallelogram is a rhombus.
Therefore, The slope of KM is 1 and the slope of NL is –1.
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Answer: D.
Step-by-step explanation: On Edge!!
Systematic random sample
What’s the definition
Answer: Systematic sampling is a type of probability sampling method where sample members from a larger population are selected based on a random starting point but with a fixed, periodic gap.
Step-by-step explanation:
Check whether the ordered pair, (4,10) is a solution of the given equation: y=4x-2
Answer:
No, it is not
Step-by-step explanation:
If you substitute 4 for x, the answer is 14. 14 does not equal 10. Therefore, it is not a solution.
how to solve 4.56x1,000
Answer:
4560
Step-by-step explanation:
There are 3 zeros in 1000. If you are multiplying, move the decimal place over however many places to the right that there are zeros. For example,
4.56 x 1000
45.6 x 100
456 x 10
4560 x 1
We moved the decimal place to the right one every time we removed a zero.
This method is extremely useful for multiplying by 1, 10, 100, etc.
Hope this helps!
(This method is an easy yet complicated way to multiply by)
What is the answer to16-5/2?
Answer:
the answer to this question is 5½
What is the slope of the line through the points (-2, -1) and (4, 3)?
Ans: 2/3
Step-by-step explanation:
Formula : [tex]m = \frac{y2 - y1}{x2- x1}[/tex] (Then replace the number in )
= 3- (-1) / 4 - (-2) = 4 / 6 = 2 / 3
Step-by-step explanation:
the slope is always the ratio "y coordinate change / x coordinate change" when going from one point on the line to another.
so, when going from (-2, -1) to (4, 3)
x changes by +6 (from -2 to 4).
y changes by +4 (from -1 to 3).
therefore, the slope is
+4/+6 = 4/6 = 2/3
I need help with this asap (50 Points)
Answer:
Multiply this measurement by two to account for both sides. Add the three separate measurements together. Because surface area is the total area of all of the faces of an object, the final step is to add all of the individually calculated areas together.
Step-by-step explanation:
Bobby has a party while his parents are away for the weekend. Bobby estimated that if his 9 friends hep him to clean the house, they will finish in time if they start 8 hours before his parents return. But after only two hours of cleaning, Bobby's parents call and say they are just two hours from home. How many more friends does Bobby need to call to help finish cleaning in time.
The number of more friends that Bobby need to call to help finish cleaning in time is 20 friends.
Number of additional friends neededLet x represent number of more friends
Number of hours=8×(9+1)
Number of hours=8×10
Number of hours=80 hours
Hence:
10×2+2(10+x)=80
20+20+2x=80
Collect like terms
2x=80-40
2x=40
Divide both side by 2x
x=40/2
x=20 friends
Therefore the number of more friends that Bobby need to call to help finish cleaning in time is 20 friends.
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l = 12 cm
b = 6 cm
Find area.
[tex]\rule{300}{1}\\\dashrightarrow\large\textsf{\textbf{\underline{Given question:-}}}[/tex]
l=12 cm; b=6 cm. What is the area?
[tex]\dashrightarrow\large\blue\textsf{\textbf{\underline{Answer and how to solve:-}}}[/tex]
[tex]\sf{Formula\:for\:Area:-}[/tex]
[tex]\sf{A=LB}[/tex]According to the above formula, we should multiply L times B, or in this case, 12 times 6:-[tex]\sf{A=12\times6}[/tex][tex]\sf{A=72cm^2}[/tex] (area is always measured in units squared)Good luck with your studies.[tex]\rule{300}{1}[/tex]
what is the domain of f(x)=2log _3(4x−8)
Answer:
{X€ IR : x>2}
Or
[tex]x \in \: )2 \: + \infty ([/tex]
Calculate: 5(3*7^15-19*7^14)/7^16+3*7^15
Step-by-step explanation:
=7¹⁵x 15-7¹⁴x 95/7¹⁶+7¹⁵x3
=1425×7²⁹/7¹⁶+7¹⁵×3
i have no idea what its asking and I'm in connection academy b
A rectangle's width is 2 meters shorter than its length, /. Its area is 168 square meters. Which equation can be used
to find the length of the rectangle?
Answer:
x(x-2)=168
x=14
Step-by-step explanation:
Let the length of the rectangle be x.
width=(x-2)
x(x-2)=168
x^2-2x=168
x=14, x=-12 (rejected)
Identify all solutions for the graph (Check as many that apply)
Answer:
the darkest shaded one.
Step-by-step explanation:
because the two areas for possible answers both intersect at that area, therefore, that is the answer.
What is the volume in cubic feet of a refrigerator whose interior is 4. 5 feet tall, 2. 5 feet wide, and 2 feet deep?
25. cuft
Answer:
22.5 feet
Step-by-step explanation:
volume of a retangular shape: l*w*h
4.5*2.5*2=22.5
