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Tom [10]
2 years ago
11

If the area of a rectangle is represented by x^2+ 27x- 124, then which expression

Mathematics
2 answers:
s344n2d4d5 [400]2 years ago
7 0
The answer is B x+31
Reika [66]2 years ago
3 0

Answer:

B x+31

Step-by-step explanation:

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1 + 5sin^2x= 7sin^2x solve trig equation. Can you show me how to solve this trig equation?
pantera1 [17]

Answer: x = \frac{\pi}{4}\pm k\frac{\pi}{2}\,\,\,\,\,\,k=\{0,1,2,...\}

Step by step:

1 + 5\sin^2x= 7\sin^2x\\\sin^2 x\rightarrow z\\1 + 5z = 7z\\2z = 1\\z = \frac{1}{2}\implies \sin^2 x = \frac{1}{2}\\|\sin x| = \frac{1}{\sqrt{2}}\\\sin x = \pm\frac{1}{\sqrt{2}}=\pm\frac{\sqrt{2}}{2}\\\implies x = \frac{\pi}{4}\pm k\frac{\pi}{2}\,\,\,\,\,\,k=\{0,1,2,...\}

(Used a table of common angles)

8 0
3 years ago
The area of this rectangle is 30 m^2 . which is the perimeter of the rectangle ?
irga5000 [103]

Answer:

D. 26 m

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
The Fernandez family drove 273 miles in 5.25 hours. How far would they have driven at that rate in 4 hours?
Vaselesa [24]
The Fernandez family would have driven 208 miles in a rate of 4 hours. 
4 0
3 years ago
Q2. Use one of the symbols or = to make this correct: (01)<br><br> 2/5 ______ 2/3
Korolek [52]

Answer:

2/5 is less than 2/3

2/5 < 2/3

Step-by-step explanation:

2/5 x 3=6/15 is small

2/3x5=1<u>0/15 is big</u>

6 0
2 years ago
What is the value of x in the figure below?
zhenek [66]
Again, nice problem. These are not super easy. You need to imagine the triangles in the figure and relate sides.

For instance: ADC, its hypotenuse is 15

For ABC, it is 20,

so 20/15 is the ratio between both triangles. Now let's choose the side with 'x'

x is one side of ADC, the corresponding side in ABC is 15 (the second longest sides). You need to rotate the triangles, etc ... That's the tricky part :)

So:

20/15 =15/x ----> x = 15*15/20 = 225/20 = 45/4

Which is C

Not sure whether it's too late to help you though!!!!

Also notice that it's kind of a product rule:

x * 20 = 15 * 15

I am sure the book explains a short way of getting to this equation, like sides opposite, blah blah, but what i told you is the reason. You asked for understanding it! Best luck!
7 0
2 years ago
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