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crimeas [40]
3 years ago
13

Using the Quadratic Formula, which of the following is the solution to the quadratic equation x2 - 3x - 28 = 0?

Mathematics
2 answers:
algol133 years ago
8 0

The answer is (x+7)(x-4)

hence, the solution should be C

Vinvika [58]3 years ago
8 0

x = [ -)-3)  +/- sqrt((-3)^2 - 4*1*-28) ] / 2

=  (3 + sqrt 121) / 2   and (3 - sqrt 121) / 2

= 3/2 + 11/2  and 3/2 - 11/

= (1.5 + 5.5)   and 1.5 - 5.5

Answer is 7, -4

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Use the given graph to determine the limit, if it exists. (4 points)
skelet666 [1.2K]
<h3>Answer:  3</h3>

Explanation:

Refer to the graph below. It should be similar to what your teacher gave you, based off the description.

Since we're approaching 3 from the right side, this means we'll be working with the horizontal line portion. We could start at something like x = 3.2 and move closer to 3 by getting to x = 3.1 then x = 3.01 then x = 3.001 and so on. We never actually get to 3 itself.

As x gets closer to 3 from this direction, the y values are approaching 3 since every point on this horizontal line has the same y coordinate. Technically the y value is already at 3, but it's the same idea.

In terms of notation, we can write \displaystyle \lim_{x\to3^{+}}f(x) = 3

The portion x \to 3^{+} means we're approaching 3 from the positive side, aka the right hand side on the number line.

8 0
2 years ago
if the perimeter of the blanket has to be at least 280 inches is there egnough room for all three of them to cuddle up under the
dezoksy [38]

Answer:

hope it helps

Step-by-step explanation:

angle < EDG = 90°

5x + 4x = 90

9x = 90

x = 90/9

x = 10°

which means

5x = 50°

4x = 40°

---------------------------

sice EF and DG are parallel lines

EHD = 40°

DHG is 90°

then HGD = 50°

-----------------------------------------

ED = 64 x2 (2 sides) = 128 inches

DG = 84 x2 (2 sides) = 168 inches

total perimeter = 128 + 168 = 296 inches

and yes. theres enough room for all 3 to cuddle

5 0
2 years ago
The manager of a store increases the price of a popular product by 5%. Let y be the original price of the product. The new price
Sphinxa [80]

Answer:

you will multiply the new price plus the original price

5 0
2 years ago
Statements Reasons
Otrada [13]

Answer:

Step-by-step explanation:

6 0
3 years ago
A line passes through the points (4, -1) and (2, 3). What is the slope of the line?
WINSTONCH [101]

Answer:

-2

Step-by-step explanation:

[3-(-1)]/[2-4] = -2

4 0
3 years ago
Read 2 more answers
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