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klasskru [66]
2 years ago
6

A

Mathematics
1 answer:
labwork [276]2 years ago
8 0

Answer:

4x^{2}+72x+320

Step-by-stepStep-by-stepStep-by-step explanation:

hope this helps :>

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For what values of k will the graph of y=kx+3 be a descending line?
Stells [14]
K is the slope
it is decending when the slope is negative

so for all values of k such that k<0, it will be decending
6 0
3 years ago
Mrs. Flores asked her students to write a number, its opposite, and its absolute value, in that order. Four of her students turn
oee [108]

Answer:

Sarah is correct

Step-by-step explanation:

Required

Which of the students is correct

Let a number be x,

Given what the teacher asked the students to do, the solution is:

Number = x

Opposite = -x

Absolute = |x|

Only Sarah got this correctly; others are incorrect.

The proof is as follows.

For Sarah

Number = 1416

Opposite = -1416

Absolute =|1416| = 1416

So, the numbers will be: 1416, -1416 and 1416

<em>Other students are incorrect</em>

4 0
3 years ago
Find the area of a rectangle with length (2x + 3) and width (x - 4). A) 2x2 - 11x - 12 B) 2x2 - 5x + 12 C) 2x2 + 11x + 12 D) 2x2
Zielflug [23.3K]

D

area of a rectangle = length × width

area = (2x + 3)(x - 4) ( expand using FOIL )

       = 2x² - 8x + 3x - 12 = 2x² - 5x - 12 → D


6 0
3 years ago
Prove the identity cos(x-y)-cos(x+y)=2sinx siny
True [87]

Answer:

see explanation

Step-by-step explanation:

Using the Addition/ Subtraction formulae for cosine

Consider the left side

cos(x - y) - cos(x + y)

= cosxcosy + sinxsiny - (cosxcosy - sinxsiny) ← distribute

= cosxcosy + sinxsiny - cosxcosy + sinxsiny ← collect like terms

= 2sinxsiny = right side ⇒ proven

8 0
4 years ago
1_9,644=100,000 to the nearest ten thousand
laiz [17]
119,644 is the answer I believe
7 0
4 years ago
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