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svetlana [45]
3 years ago
9

Jeremy bought postcards on a trip. He

Mathematics
1 answer:
noname [10]3 years ago
5 0

Answer:

T = total #

T = 5 (to the aunt) + 1/2 (T - 5) (to his friends) + 1 (to his sister) + 4 (left)

T = 5 + 1/2 (T - 5) + 1 + 4

T = 10 + 1/2 (T - 5)

2T = 20 + (T - 5)

2T = 20 + T - 5

2T = 15 + T

T = 15

Step-by-step explanation:

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Help needed ASAP!!!
horrorfan [7]

Answer:

Angle b = 30 degrees

Step-by-step explanation:

3x = 90.

X= 30

Angle b = 30 degrees

7 0
3 years ago
Read 2 more answers
What is 578 x 6,937, please
kati45 [8]
<span>400,958,6 Hope this helps!</span>
7 0
3 years ago
Read 2 more answers
What is the x-coordinate for the minimum point in the function f(x) = 4 cos(2x − π) from x = 0 to x = π?
melamori03 [73]
When you are looking at a graph, a minimum point would be where the curve is decreasing, then begins to increase. Right at the point where it switches, the slope is a horizontal line, or 0. We can take the derivative is f(x), then look for all the x values where the slope (which is equal to the first derivative) is equal to zero.

f'(x) = 2 * -4sin(2x - pi)

The 2 comes from the derivative of the inside, 2x-pi.

So now set the derivative equal to 0.

-8sin(2x-pi) = 0

We can drop the -8 by dividing both sides by -8.

sin(2x-pi) = 0

This can be rewritten as arcsin(0) = 2x-pi

So when theta equals 0, what is the value of sin(theta)? At an angle of 0, there is just a horizontal line pointing to the right on the unit circle with length of 1. Sine is y/h, but there is no y value so it is just 0. If arcsin(0) = 0, we can now set 2x-pi = 0

2x = pi

x = pi/2

This is a critical number. To find the minimum value between 0 and pi, we need to find the y values for the endpoints and the critical number.

f(0) = -4

f(pi/2) = 4

f(pi) = -4

So the minimum points are at x=0 and x=pi




5 0
4 years ago
What is the nth term in the sequence: 15, 22, 31, 42, 55
Lynna [10]
Counting by seven’s then 9 then 10 then 13
5 0
4 years ago
I need help with this!
ruslelena [56]
|12| ÷ 2 • |-5|
= 12 ÷ 2 • 5
= 6 • 5
= 30
Absolute values just make the number positive if it is negative. The number stays positive if it’s positive.
7 0
4 years ago
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