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Simora [160]
3 years ago
7

How do you factor 20x^2 - 66x +54 ?

Mathematics
1 answer:
yarga [219]3 years ago
3 0
There is a way to factor with a leading coefficient larger than 1, but first, it would be easier to factor out a number to make the next steps easier.
2(10x²-33x+27) ← Factor out a 2, then just temporarily drop it to make things less messy

So now we have 10x²-33x+27. The first step when factoring with a leading coefficient is to multiply the leading coefficient (10) and the constant (27) = 270. Then, we find the factors of 270 and see what would add to give -33.
The factors are -15 and -18

Then, we get (10x²-15x)+(-18x+27)
Factor out a 5x from the first, and -9 from the second
5x(2x-3)-9(2x-3)
That would give us (5x-9)(2x-3) but don't forget the 2 from above! Therefore, the final answer is:
2(5x-9)(2x-3)
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Solve the slope…. pls
Zielflug [23.3K]

Answer:

slope = 5/7

Step-by-step explanation:

Given the x-intercept: (-7, 0) and the y-intecept: (0, 5):

We can use the slope formula:

m = \frac{y2 - y1}{x2 - x1}

Let (x1, y1) = (-7, 0)

(x2, y2) = (0, 5)

Plug these values into the slope formula:

m = \frac{y2 - y1}{x2 - x1} = \frac{5 - 0}{0 - (-7)} = \frac{5}{7}

Therefore, the slope is 5/7

4 0
2 years ago
A car rental company charges rs 500 a day
Montano1993 [528]

Answer:

total bill=1644

let he drives x kilometer

then

500*2+8*x=1644

1000+8x=1644

8x= 1644-1000

8x= 644

x= 644/8=80.5 km

Step-by-step explanation:

8 0
3 years ago
Pip and Sara win some money and share it in ratio 5:4 pip gets £50 how much did they get all together
N76 [4]

Answer: £90

Step-by-step explanation:

Pip and Sara get some money. They share it in the ratio 5 : 4.

Pip gets £50 so what did Sara get:

Use direct proportion:

5  :  4

50 :   x

5x = 200

x = 200/5

x = £40

Pip got £50 and Sara got £40.

Together they got:

= 50 + 40

= £90

4 0
2 years ago
Jillian is using integer tiles to add 7 + (negative 2). She uses the steps below. Step 1 7 positive tiles. Step 2 7 positive til
raketka [301]

Answer:

<h3>Step 4</h3>

Step-by-step explanation:

Given the expression 7+(-2)

Let 7 be 7 positive tiles since it is a positive number

Let -2 be 2 negative tiles being a negative number

7+(-2) = 7 positive tiles <em>and</em> 2 negative tiles

note that + * - will give minus sigh (-), the expression will become:

7+(-2) = 7-2

7-2 = 5

Hence the expression gives 5 positive tiles not 2 positive tiles according to Jillian calculations in step 4.

Hence Jillian made an error in step 4

7 0
3 years ago
Read 2 more answers
A graph of a line has an x-intercept of 4
Reil [10]
The answer looks like it could be b
8 0
2 years ago
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