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hoa [83]
2 years ago
11

A) Factorise 2x² - 9x - 5 (x-5)(2x+1) (2) b) Hence, simplify fully 2x^2- 9x - 5 3x – 15x (2) ​

Mathematics
1 answer:
Lyrx [107]2 years ago
8 0

Answer:

Step-by-step explanation:

<u><em>b).</em></u>

2x² - 9x - 5 = ( x - 5 )( 2x + 1 )

3x² - 15x = 3x ( x - 5 )

\frac{(x-5)(2x+1)}{3x(x-5)} = \frac{2x+1}{3x}

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What is the least perimeter of a rectangle with an area of 32 square feet
Phoenix [80]
There's 3 possibilities for a rectangle with an area of 32 square feet.
8 \times 4 \\ 16 \times 2 \\ 32 \times 1
If 8 x 4, Perimeter =
2(8) + 2(4) = 24
If 16 x 2, Perimeter =
2(16) + 2(2) = 36
If 32 x 1, Perimeter =
2(32) + 2(1) = 66

Hence, the least perimeter is 24 feet.

Hope this helps. - M
7 0
3 years ago
What is the answer for this questions<br> and explain why
qwelly [4]

Answer:

B

Step-by-step explanation:

Well you first know that your y-intercept is -2 (look on the graph) so you can automatically cancel out option A and D. Now this leaves us with B and C. The only thing that is different between the two answers is the slope. Slope = Δy/Δx (change in y divided by change in x) So from (0,-2) to the next point (4, -1) How far is the x and y? Well you go up one and to the right 4. the change in y is up one (+1) and the change in x is right 4 (+4).

You can also do this

\frac{-2-(-1)}{0-4} = \frac{-1}{-4} = 1/4\\

(y2-y1)/(x2-x1) (the numbers are subscripts)

hope that helped:)

7 0
3 years ago
Read 2 more answers
A^9*8a^4 will mark as brainiest
Aneli [31]
A9*8a4

Final result :

23a13
Step by step solution :

Step 1 :

Equation at the end of step 1 :

23a9 • a4
Step 2 :

Multiplying exponential expressions :

2.1 a9 multiplied by a4 = a(9 + 4) = a13

Final result :

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7 0
3 years ago
Read 2 more answers
2x+5&gt;7 problem solving
Anna71 [15]

Answer:

x > 1

Step-by-step explanation:

2x+5>7

move constant to right

2x>5-7

subtract 7 and 5

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divide both sides

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7 0
3 years ago
Given that a=16cm and b=17cm work out the height of the triangle
lilavasa [31]

Answer:

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Step-by-step explanation:

Here,

b² = a² + c²

Because it is a right triangle

=> (17)² = (16)² + c²

=> 289 = 256 + c²

=> 289 - 256 = c²

=> 33 = c²

=> √33 = c

Hence,

height of triangle is √33 cm

6 0
2 years ago
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