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masya89 [10]
4 years ago
15

For the geometric sequence: 112.5, 225, 450, 900,..., find the 21st term.

Mathematics
1 answer:
ch4aika [34]4 years ago
3 0

Answer:

Step-by-step explanation:

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Algebra Find the values for x and y in parallelogram ABCD. AE= x+5, EC=y, DE=2x+3, EB=y+2
olya-2409 [2.1K]

The values of x and y are ⇒ x = 4 and y = 9

Step-by-step explanation:

In a parallelogram

1. Each two opposite sides are equal and parallel

2. Each two opposite angles are equal

3. Its two diagonals bisect each other

In parallelogram ABCD

∵ Its diagonal AC and BD intersect each other at point E

∵ AC and DE bisect each other at E

∴ E is the mid-point of AC

∴ AE = EC

∴ E is the mid-point of BD

∴ DE = EB

∵ AE = x + 5

∵ EC = y

∵ AE = EC

∴ x + 5 = y ⇒ (1)

∵ DE = 2x + 3

∵ EB = y + 2

∵ DE = EB

∴ 2x + 3 = y + 2

- Subtract 2 from both sides

∴ 2x + 1 = y ⇒ (2)

Substitute y in equation (2) by equation (1)

∵ 2x + 1 = x + 5

- Subtract x from both sides

∴ x + 1 = 5

- Subtract 1 from both sides

∴ x = 4

Substitute the value of x in equation (1) to find y

∵ x + 5 = y

∵ x = 4

∴ 4 + 5 = y

∴ y = 9

The values of x and y are ⇒ x = 4 and y = 9

Learn more:

You can learn more about parallelograms in brainly.com/question/6779145

#LearnwithBrainly

6 0
3 years ago
If you subtract my number from 300, or if you add my number to 220, you will get the same result. What is my number?
Oxana [17]

Answer:

40

Step-by-step explanation:

Subtracting a number k from 300 looks like this 300-k.

Adding a number k to 220 looks like this 220+k.

They are saying for some number k that we have 300-k and 220+k is the same value.

That is, 300-k=220+k.

This is the equation we are going to solve for your number.

300-k=220+k

Add k on both sides:

300=220+2k

Subtract 220 on both sides;

80=2k

Divide both sides by 2:

40=k

k=40.

So the number is 40.

Check: 300-40=260 while 220+40=260.

8 0
3 years ago
What is the principal square root of -25?
Georgia [21]
√-25

= √(25*-1) = √25 * √-1 = 5i,  where i = √-1

The principal square root = 5i

6 0
3 years ago
1. f(6) if f(x) = 4x I know the answer I just need the explanation please thank you!
suter [353]
So when you have one of these, it’s just asking you so solve it as if x were 6 (as you see where the x in f(x) is replaced with a 6.

so you’d sub x for 6

giving you:

4 x (6)

which = 24

hope that makes sense :)
6 0
3 years ago
Read 2 more answers
Which of the following figures has one polygon-shaped base? cone cylinder prism pyramid
navik [9.2K]
Cone is the one with only one base. If this helped please Mark as Brainliest! Thanks! :)
4 0
3 years ago
Read 2 more answers
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