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Igoryamba
3 years ago
15

Solve by factorising the equation 8x^2-30x-27=0

Mathematics
1 answer:
IrinaK [193]3 years ago
6 0
I got 9/2,-3/4. hope it helps

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What is the value of x in the equation 2x + 1/2x + 2(1+x) = 29?
erica [24]

Answer:

<h2>x = 6</h2>

Step-by-step explanation:

2x  +  \frac{1}{2} x + 2(1 + x) = 29

Multiply through by 2

That's

4x + x + 4(1 + x) = 58

<u>Expand</u>

That's

5x + 4 + 4x = 58

9x = 58 - 4

9x = 54

Divide both sides by 9

That's

\frac{9x}{9}  =  \frac{54}{9}

We have the final answer as

<h3>x = 6</h3>

Hope this helps you

5 0
2 years ago
Andrew invited 30 friends to his birthday party. Seventy percent of his friends came to the party. The other 30% did not come to
solong [7]

Answer:

  70% = 7/10

Step-by-step explanation:

The fraction is given in the problem statement as 70%. It can be expressed as 7/10, 0.7, 0.70, and many other ways. Take your pick.

3 0
3 years ago
How do you simplify without using a calculator (-5)(7)+4×5​
Evgesh-ka [11]

Answer:

-15 Is the answer

Step-by-step explanation:

(-5)(7)+4×5​

= -15

(-5)(7) + 4×5 = -15/1 = -15

Multiple: -5 * 7 = -35

Multiple: 4 * 5 = 20

Add: the result of step No. 1 + the result of step No. 2 = -35 + 20 = -15

Hope this helps.

7 0
2 years ago
6.<br> Use the Change of Base Formula to evaluate log base 4 20
tatiyna

Answer:

The answer with calculator would be 2.16096

4 0
2 years ago
Which expression can be used to find the surface area of the following square pyramid?
kodGreya [7K]

Answer:

Step-by-step explanation:

expression for surface area = a² + a √(a²/4+h²)

=4² + 2(4) √(4²/4+5²)

=16 + 8  √(16/29)

= 24 √0.55

= 20.65

6 0
2 years ago
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