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3 years ago

X^2 - 4x + 3 how do I factor the expression completely

2 answers:

8 0

Bx must be the sum of the numbers in the bracket and c must be the product. So we need to choose 2 numbers that multiply to make 3 and add to make -4.

A negative x negative = positive so
-3*-1=3
-3-1=-4

Therefore:
(x-3)(x-1)

Kitty [74]3 years ago

3 0

$x^2 - 4x + 3=\\
x^2-x-3x+3=\\
x(x-1)-3(x-1)=\\
(x-3)(x-1)$

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Anyone know the answer to any of these.

skad [1K]

A is c=75 B is a=120 C is b= square root of 75 and D= square root of 245

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3 years ago

A small tree was planted at a height of 5 feet. The tree has been planted for 14 months and is now 41.4 feet tall. Which equatio

Hoochie [10]

Answer:

I'm not 100% sure but I think its D.

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3 years ago

Jim went by bus to visit his uncle. He left at 10 A.M. and arrived at 4 P.M. The bus traveled 270 mi. What was its average speed

Feliz [49]

Answer:

Average speed, S = 45 mph

Step-by-step explanation:

Given the following data;

Take-off time = 10 AM

Arrival time = 4 PM

Distance = 270 miles

To find the average speed of the bus;

First of all, we would determine the total time.

10 AM to 4 PM = 6 hours

Total time = 6 hours

Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.

Mathematically, speed is given by the formula;

$Speed = \frac{distance}{time}$

Substituting into the formula, we have;

$Speed = \frac{270}{6}$

Average speed, S = 45 mph

Therefore, the average speed of the bus is 45 miles per hour.

4 0

3 years ago

Let X and Y be the following sets: X={0,12,23} Y={3,12,15} Which of the following is the set X \ Y?

Digiron [165]

Answer:

Step-by-step explanation:

X={0,12,23}

Y={3,12,15}

X \ Y = { 0 , 23}

X/Y means the element should be only in X. We have remove the element in X if it is in Y

In this 0 and 23 is only in X

12 is X and Y. So it wont come in X/Y

8 0

3 years ago

An office supply store sells 12 rolls of tape for $29.88. At that rate, which proportion could be used to solve for c, the cost

kobusy [5.1K]

Answer:

$89.64

Step-by-step explanation:

First, you want to find your unit rate.

To do that, simply just divide what you know (cost/amount):

29.88/12

= 2.49

This means that one role of tape costs $2.49.

Now that we know that, you can simply just solve for value "c":

c = 2.49(36)

c = 89.64

8 0

3 years ago