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BARSIC [14]
3 years ago
11

Số hạng đầu và số hạng thứ 2 của một cấp số nhân lần lượt là x+2 và x^2 -4 số hạng thứ 3 của cấp số nhân này là

Mathematics
1 answer:
GenaCL600 [577]3 years ago
3 0

Answer:

x³-2x²-4x+8

Step-by-step explanation:

a1=x+2

a2=x²-4⇒q=a2/a1=x-2

⇒a3=q.a2=(x-2).(x²-4)=x³-2x²-4x+8

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Lin solved the equation
Alekssandra [29.7K]

Answer: x=1/2

she was wrong, it's supposed to be

Step-by-step explanation: 8(x−3)+7=2x(4−17)

Step 1: Simplify both sides of the equation.

8(x−3)+7=2x(4−17)

(8)(x)+(8)(−3)+7=2x(4−17)(Distribute)

8x+−24+7=−26x

(8x)+(−24+7)=−26x(Combine Like Terms)

8x+−17=−26x

8x−17=−26x

Step 2: Add 26x to both sides.

8x−17+26x=−26x+26x

34x−17=0

Step 3: Add 17 to both sides.

34x−17+17=0+17

34x=17

Step 4: Divide both sides by 34.

34x/34=17/34 x=1/2

3 0
3 years ago
Look at the picture of a scaffold used to support construction workers. The height of the scaffold can be changed by adjusting t
timama [110]

Step-by-step explanation:

<u>Using Pythagorus theorem</u> :

(A)

PR =  \sqrt{ {PQ}^{2}  +  {QR}^{2} }

PR =   \sqrt{196 + 81}  =  \sqrt{277}  = 16.64 \: cm

(B)

QR  =   \sqrt{ {PQ}^{2}  +  {PR}^{2} }  =  \sqrt{196 +324 }  = 22.8 \: cm

5 0
4 years ago
Wilma can mow a lawn in 90 minutes. Bullwinkle can mow the same lawn in 60 minutes. How long does it take for both Wilma and Bul
boyakko [2]

Answer:

90+60 =150 minutes/2 = 75 minutes pls mark brainliest



4 0
4 years ago
150 people are in a movie theater to see Wonder Woman. If 7 out of 30 of them are boys how many boys are there?
I am Lyosha [343]

Answer:

35 boys

Step-by-step explanation:

hope it helps

5 0
3 years ago
Which of the following statements are true of the hypotenuse of a right triangle? Select all that apply. A.) It is the longest s
kirza4 [7]
<span>True    A.) It is the longest side of a right triangle.
False  B.) It is one of the legs. It is opposite the right angle.
False  C.) Its length is the sum of the lengths of the other two sides.
False  D.) It forms a right angle with an adjacent side.

If option B is a single choice, then it has to be called false.

Look at option B.
B. "It is one of the legs" is false.
"It is opposite the right angle" is true.
Are you sure option B. is not two different choices, and there are really 5 choices instead of 4?
</span>
6 0
4 years ago
Read 2 more answers
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