Answer:
12 sq cm
Step-by-step explanation:
Area of rectangular pyramid = Area of base which is square + 4 times the area of one triangle.
[tex] = {2}^{2} + 4( \frac{1}{2} \times 2 \times 2) \\ \\ = 4 + 4(2) \\ \\ = 4 + 8 \\ \\ = 12 \: {cm}^{2} [/tex]
HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
78
Step-by-step explanation:
Arc GHJ is 81*2= 162 (the arc measure of an inscribed angle that does not cross the center of the circle is 2 times the measure of the angle
since arc GH is 84 and we need HJ, subtract 84 from 162=78
Which of the following are mathematical sentences? Check all that applu
A. 4- d= 12
B. 4-V> 2
C. 3 + 2
D. 59
E. 6 + a = 13
F. 12x
Answer:
The correct options are:
A, B, and E.
Step-by-step explanation:
A mathematical sentence (or a mathematical statement) is a sentence that can be true or false.
This is the only criteria we need to check, now let's analyze each option.
A: 4 - d = 12
This can be true or false, for example, if d = 0 the sentence is false because:
4 - 0 = 12
4 = 12 is false.
and if d = -8 the sentence is true, because:
4 - (-8) = 12
4 + 8 = 12
12 = 12
is true.
B: 4 - V > 2
This sentence can be true or false, same reasoning as before, we can find values of V such that this is true or false.
C: 3 + 2
Now, here we can't say if this is true or false, so this is not a mathematical sentence.
D: 59
Same as before, this is just a number.
E: 6 + a = 13
This can be true or false, depending on the value of a, then this is a mathematical sentence.
F: 12*x
Here we can not say if this is true or false, so this is not a mathematical sentence.
The correct options are:
A, B, and E.
The product of 3m and 5r is 15mr True or False Explain...
Step-by-step explanation:
let's see....
3m × 5r = 15mr
15(m × r)
15mr.
if it helps don't forget to like and mark me down
Using the following data set calculate the mean 9,14,14,9,20,6,8,19,17,13,9
Answer:
12.54
Step-by-step explanation:
When finding the mean, first you add all the numbers in the data:
9+14+14+9+20+6+8+19+17+13+9=138
And then you divide it by the following numbers in the set. In this data set, since there are 11 numbers, you would divide 138 by 11.
138\11=12.5454545
So the answer would be 12.54 if your rounding to the nearest hundred. If your rounding it by a whole number, it would be 13.
A 6-foot ladder is placed against a wall with its base 2
feet from the wall. How high up the wall is the top of the
ladder? (HINT: Draw a diagram to help you visualize
the problem.)
In a study of the relationship between pet ownership and physical activity in older adults, 586 subjects reported that they owned a pet, while 1931 reported that they did not. Give a 98% confidence interval for the proportion of older adults in this population who are pet owners. Lower limit Incorrect: Your answer is incorrect. Upper limit
Answer:
Step-by-step explanation:
In a study of the relationship between pet ownership and physical activity in older adults, 586 subjects reported that they owned a pet, while 1931 reported that they did not. Give a 98% confidence interval for the proportion of older adults in this population who are pet owners. Lower limit Incorrect: Your answer is incorrect. Upper limit
p ± z × (1 - p/n)
z = 98%
p = 586/1931
= 0.3034697048
n = 1931
Approximately = 0.3035
Confidence interval =
0.3035 + 2.326 × ( 1 - 0.3035/ 1931)
1 (10)(8.4 + 8.6) - please
170 ..I think I'm correct
Which of the following rules best describes the matrix below
a. dilation of scale factor 2
b. reflection over the y-axis
c. reflection over the line y = x
d. translation 1 unit left and 1 unit up
Answer: D
Step-by-step explanation:
d. translation 1 unit left & 1 unit up
right on edg
A sequence can be generated by using an=12an−1, where n is a whole number greater than or equal to 1.
Given a9=12, what is a10?
5
6
13
24
Answer:
8, 11, 14, 17
Step-by-step explanation:
For example,
Given: an=2an−1−xan=2an−1−x
a5=99a5=99
a3=27a3=27
a5=2a4−x=2(2a3−x)−x=4a3−3x=99a5=2a4−x=2(2a3−x)−x=4a3−3x=99
4(27)−3x=994(27)−3x=993x=108−99=93x=108−99=9
x=3x=3
Is this correct? I really need to know this
Answer:
Slope (m) = 2
Step-by-step explanation:
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
consider 2 points - (20,20) and (30,40)
[tex]m = \frac{40-20}{30-20}[/tex]
[tex]m=\frac{20}{10}[/tex]
[tex]m=2\\[/tex]
∴ Slope (m) = 2
Plastic parts manufactured using an injection molding process may exhibit one or more defects, including sinks, scratches, black spots, and son on. Let x represent the number of defects on a single part, and suppose the distribution of x is as follows: x: 0 1 2 3 4 p(x): 0.79 0.09 0.05 0.04 0.03 What is the expected value, E(X), for the number of defects on a randomly selected plastic part
Answer:
The expected value for the number of defects on a randomly selected plastic part is 0.43.
Step-by-step explanation:
We have the following probability distribution:
P(X = 0) = 0.79
P(X = 1) = 0.09
P(X = 2) = 0.05
P(X = 3) = 0.04
P(X = 4) = 0.03
What is the expected value, E(X), for the number of defects on a randomly selected plastic part?
Each value multiplied by its probability. So
[tex]E(X) = 0.79*0 + 0.09*1 + 0.05*2 + 0.04*3 + 0.03*4 = 0.43[/tex]
The expected value for the number of defects on a randomly selected plastic part is 0.43.
The temperature outside is 10°F. By evening, the temperature has dropped by 15°F. What is the new temperature?
10. What is the measure of ZP?*
E
(15m + 17)º
-Q
(4m – 10)
P
(7m - 9)
Answer:
m∡P = 40°
Step-by-step explanation:
15m + 17 + 4m - 10 + 7m - 9 = 180
26m - 2 = 180
26m = 182
m = 7
∡P = 7(7) - 9 = 49 - 9 = 40
If a product of three numbers is 3150, two of the numbers are 14,15. Find the third number
Answer:
15
proof on pic......................
thomas has 12 more marbles than twice the number of marbles Andrew has.
Andrew has x marbles. which expression represents how many marbles thomas has?
A. x + 2 + 12
B.x+12(2)
C.2x+12
D.2(x+12)
Answer:
A.
x + 2 + 12
Step-by-step explanation:
Thomas (t) = Andrew (x) * 2 + 12
Use the distributive property to simplify the expression 7 (8x+3).
7(8X+3=
Answer:
56x+21
Step-by-step explanation:
7times 8x is 56x
7 times 3 is 21
add them together and you get 56x+21
What is the distance between the points (4, 9) and (4, 2)? A) 2 B) 5 C) 7 D) 8
Answer:
The answer is 7
Step-by-step explanation:
I took the test and failed it cuz I put 5. Don't listen to that other dude. So I know what I'm talking about. Just listen to me and you won't fail.
The length of a rectangle is 3 yards less than 5 times the width. If the perimeter is 102 yards, find the length and the width of the rectangle.
Answer:
Width = 9 yards, length = 42 yards
Step-by-step explanation:
Perimeter = 2xlength + 2xwidth. Let's call length L and width W. The question also states that L = 5W-3. Therefore, 102 = 2x (5W-3) + 2W. Then, 102 = 12W - 6. 108 = 12W, so W = 9 yards. Since L = 5W - 3, we get 45-3 = 42 yards.
If f(x)= - 4x-4, g(x)= 4x² + 4x + 2, and h(x)= 3x2 – 3, find f(3).
f(3) =
(Simplify your answer.)
Answer:
[tex]f(3) = -16[/tex]
Step-by-step explanation:
Given
[tex]f(x)= - 4x-4[/tex]
[tex]g(x)= 4x^2 + 4x + 2[/tex]
[tex]h(x)= 3x^2 - 3[/tex]
Required
[tex]f(3)[/tex]
We have:
[tex]f(x)= - 4x-4[/tex]
Substitute [tex]x = 3[/tex]
[tex]f(3) = -4 * 3 - 4[/tex]
[tex]f(3) = -12 - 4[/tex]
[tex]f(3) = -16[/tex]
Hence:
[tex]f(3) = -16[/tex]
At the beginning of the week, the temperature was 15. During the week, it decreased by 20. What was the temperature by the end of the week? What is the percent Change of the weekly temperature? Show work
Answer:
Initial temperature = 15Decrease during the week = 20Temperature by the end of the week:
15 - 20 = -5Change is 20
Percent change is:
20/15*100% = 133.33%What type of correlation is shown in the graph?
A. Positive
B. Negative
C. No Correlation
D. Linear
Answer:
This graph shows a negative correlation
Hope this helps!
HURRY PLS 7TH GRADE MATH I NEED HELP I HAVE LESS THAN 5 MINS TO DO THIS
Answer:
35 = 8 + x + x + x + x + x +x
35 = 8 + 6x
6x + 8 = 35
35 - 8 = 6x
Step-by-step explanation:
hope this helps:)
Which value of x will make these ratios equivalent
24/42=4/x
A.19
B.15
C.7
D.5
21.79 + x = 25
make sure to do a explanation
Answer:
x= 3.21
Step-by-step explanation:
25- 21.79= 3.21
the equation equals to 25 so you need to find what x is by subtracting the other value
Hope this helps
To the nearest square centimeter, what is the area of the circle below? Use pi = 3.14
Answer:
[tex]radius \: \: r = 5 \: cm \\ area = \pi {r}^{2} \\ = 3.14 \times (5) {}^{2} \\ = 78.5 \: {cm}^{2} [/tex]
Answer:
[tex]78.5cm^{2}[/tex]
Step-by-step explanation:
[tex]A=\pi r^{2}[/tex]
[tex]A=(\pi )(5)^{2}[/tex]
[tex]A=78.5[/tex]
so I guess rounding it to 79
A car can travel at least 70 miles per hour faster than 4 times the speed of someone walking. Which inequality represents the relationship between the speed of the person walking, m, and the speed of the car, v?
A. v ≥ 560m
B. v ≥ 4 + 70m
C. v ≥ 4m - 70
D. v ≥ 4m + 70
Answer:
D
Step-by-step explanation:
plz tell me if correct!
and PLZ GIVE BRAINLIEST
plz help will give crown
Answer:
x=8
Step-by-step explanation:
-2(8) would be -16 so -18 is still greater
Answer:
B
Step-by-step explanation:
all the others will have a value of more than -18. Only B makes sense.
Hope this helps! Have a great day
65+ ? -15=65 Find missing number
Answer:
65 + 15 - 15 =65
Step-by-step explanation:
pls give brainlist if this was helpful ^^
the real zeros of √(x-1)+x+1
Can some one please explain how to do this? 1.253 x 7.4 =
Answer:
9.2722
Step-by-step explanation:
7.400
*1.252
_____
9.2722
Its simple, plz rate 5 str, thx, and brailiest