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Semmy [17]
3 years ago
7

Brainliest to correct!

Mathematics
1 answer:
OLEGan [10]3 years ago
6 0

Answer:

A) (-infinity, -7]U[-2, -1]

B) [-7, -5]

C) [-5, -2]U[-1, infinity)

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I need help woth question and my test
Maksim231197 [3]

Answer:

28.26 cm^2

Step-by-step explanation:

The area of the quarter circle is the area of the circle / 4. Thus, the area is \frac{\pi r^2}{4} = \frac{3.14*6^2}{4} = 28.26 square centimeters

8 0
2 years ago
Read 2 more answers
The length of the red line segment is 8, and the length of the blue line segment is 4. How long is the major axis of the ellipse
inessss [21]

Answer: the answer is

C. 12

5 0
3 years ago
HELP PLEASE I NEED THIS DONE
Oduvanchick [21]

Answer:

138.3ft^3

Step-by-step explanation:

Volume for cylinders : V = pi*r^2*h

Volume for cones : V = pi*r^2*(h/3)

Since we know the radius (r) is 2 and the height is 10 and 3 for the cylinder and cone respectively, all we do is plug in.

Volume for cylinder is about 125.7ft^3

Volume for cone is about 12.6ft^3

Then just add them together for a total of 138.3ft^3

8 0
3 years ago
dale is driving to Miami. suppose that the distance (in miles) is a linear function of his total driving time (in minutes). dale
nexus9112 [7]
Considering there is a function (relationship) and that it is linear, the distance will change proportionally to time constantly. In other words, we are taking the speed to be constant throughout the journey.
If we let:
t = time (min's) driving
d = distance (miles) from destination
Then we can represent the above information as:
t = 40: d = 59
t = 52: d = 50
If we think of this as a graph, we can think of the x-axis representing time and the y-axis representing the distance to the destination. Being linear, the function will be a line, i.e. it will have a constant gradient. If you were plot the two points inferred from the information and connect the two dots, you will get a declining line (one with a negative gradient) representing the inversely proportional relationship or equally, the negative correlation between the time driving and the distance to the destination. The equation of this line will be the linear function that relates time and the distance to the destination. To find this linear function, we do as follows:

Find the gradient (m) of the line:
m = Δy/Δx
In this case, the x-values are t-values and our y-values are d-values, so:
Δy = Δd
= 50 - 59
= -9
Δx = Δt
= 52 - 40
= 12
m = -9/12 = -3/4
Note: m is equivalent to speed with units: d/t

Use formula to find function and rearrange to give it in the desired format:
y - y₁ = m(x - x₁)
d - 50 = -3/4(t - 52)
4d - 200 = -3t + 156
4d + 3t - 356 = 0

Let t = 70 to find d at the time:
4d + 3(70) - 356 = 0
4d + 210 - 356 = 0
4d - 146 = 0
4d = 146
d = 73/2 = 36.5 miles

So after 70 min's of driving, Dale will be 36.5 miles from his destination.
3 0
3 years ago
In circle C, r = 32 units.
vlabodo [156]
Probably 2561 but since area equal r^2 I thought it would be 3217
5 0
3 years ago
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