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netineya [11]
2 years ago
5

(c) If 2a + 7b = 11 and ab = 2, find the value of 4a2 + 49b2.​

Mathematics
2 answers:
Mademuasel [1]2 years ago
5 0

I hope this helps you

take both of sides paranthesis square

(2a+7b)^2=(11)^2

4a^2+2.4a.7b+49b^2=121

4a^2+49b^2+56.2=121

4a^2+49b^2=9

kirill115 [55]2 years ago
3 0

Answer:

65

Step-by-step explanation:

Please see the attached picture for full solution.

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SOMEONE PLS HELP QUICK WILL GIVE BRAiNLIEST
skad [1K]

Answer:

1. x^2-9x+18

2. 2x^2-4x-16

3. 3x^2-19x-14

4. 6x^2 +14x + 8

Step-by-step explanation:

1. (x-3)(x-6)

x^2 - 6x - 3x +18 = x^2-9x+18

2. (2x+4)(x-4)

2x^2-8x+4x-16 = 2x^2-4x-16

3. (x-7)(3x+2)

3x^2+2x-21x-14 = 3x^2-19x-14

4. (3x+4)(2x+2)

6x^2+6x+8x+8 = 6x^2 +14x + 8

6 0
2 years ago
If the points (-8, 7) and T (6,-3) are on a line segment, find the length of ST.​
larisa86 [58]

Answer:

The answer is

<h2>2√74 or 17.20 units</h2>

Step-by-step explanation:

The length of w line segment between two points can be found by using the formula

d =  \sqrt{ ({x1 - x2})^{2} +  ({y1 - y2})^{2}  }  \\

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

S(-8, 7) and T (6,-3)

The length of ST is

|ST|  =  \sqrt{ ({ - 8 - 6})^{2} +  ({7 + 3})^{2}  }  \\  =  \sqrt{ ({ - 14})^{2} +  {10}^{2}  }  \\  =  \sqrt{196 + 10}  \\  =  \sqrt{296}  \\  = 2 \sqrt{74}  \\  = 17.2046505...

We have the final answer as

<h3>2√74 or 17.20 units</h3>

Hope this helps you

8 0
3 years ago
Frank drove to college and back again. He took 3 hours longer to go to college than he did to come back. On the way there he tra
egoroff_w [7]

Answer:

6 hours...............

4 0
3 years ago
I need help with 1 AND b, please explain!
Thepotemich [5.8K]
First answer is 27
Multiply -3 with -1
Then multiply it to the 3rd power.


2nd answer is 1 / 1296
First add the expoinents
-12 +8 = -4

Then you would need to do the equation
6^-4 x 6^0
And this would equal 1/1296

Please mark Brainliest :)
4 0
3 years ago
Read 2 more answers
The formula used to calculate simple interest is modeled by I=prt, where I=simple interest, p=principle, r=interest rate, and t=
asambeis [7]
<span>An alternative equivalent versions are:

</span><span>I = trp
</span><span>t= l/rp
</span><span>p= l/rt</span>
5 0
3 years ago
Read 2 more answers
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