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padilas [110]
3 years ago
7

Why do we use the quadratic formula as opposed to trying to solve using factoring

Mathematics
1 answer:
Jlenok [28]3 years ago
8 0
Sometimes there is no apparent way to factor it by hand /(the factors are decimals or imaginary). To try and factor these problems is nearly impossible in your head.
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Pls help with these questions
postnew [5]

Find x-intercept and y-intercept then you can draw the graph.

For example, the first question.

y=-3x+2

To find the y-intercept, x = 0

So substitute x = 0 in the equation.

y=0+2\\y=2

[Note]: You don't need to find the y-intercept, because from, y=ax+b

a is slope and b is y-intercept, you know b then you know y-intercept. For example b = 2 then y-intercept is at 2.

To find the x-intercept, y = 0

-3x+2=0\\-3x=-2\\x=\frac{2}{3}

Therefore, y-intercept = 2 and x-intercept = 2/3

(Try do another problems, just do the same. When you want to find the y-intercept, just look at the value of b or substitute x = 0 and When you want to find the x-intercept, just substitute y = 0 then solve for x.)

3 0
3 years ago
The ratio of pants to shots that John has is 2:3. If John has 8
boyakko [2]

Answer:

12 shirts

Step-by-step explanation:

Since John has 8 pants and 2 x 4 is equal to 8. Then you must multiply the number of shirts by 4 (3 x 4) to give you the number of shirts, which is 12.

Check:

2/3 is equivalent to 8/12

Hope this helps :)

3 0
3 years ago
Question in photo—————————-
IgorC [24]

Answer:

Answer is -8.........bro

8 0
3 years ago
The perimeter of a rectangle is 54cm. The area of the same rectangle is 176 cm^2. What are the dimensions of the rectangle?
densk [106]

Given is rectangle with perimeter = 54 centimeters and area = 176 squared centimeters.

Let's consider the length of rectangle = L and width of rectangle = W.

We know the following formulas for rectangle :-

Perimeter = 2 x (L + W)

Area = L x W

So we have 2 x (L + W) = 54 and L x W = 176.

L + W = 27 and L x W = 176

We need to find two positive integers such that their sum is 27 and product is 176.

Using trial and error, we have two such positive integers such that 11 + 16 = 27 and 11 x 16 = 176.

So, the dimensions of rectangle would be 11cm x 16cm.

Hence, option A is correct i.e. 11 cm by 16 cm.

3 0
3 years ago
I need help fast if you can help me that would be amazing
qaws [65]
A, b, d, g are the answers in order
7 0
4 years ago
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