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Sav [38]
3 years ago
11

A square is cut out of a copper sheet. Two straight scratches on the surface of the square intersect forming an angle. The squar

e is heated uniformly. As a result, the angle between the scratches
a) increases
b) decreases
c) stays the same
d) The answer depends on whether θ is an acute or obtuse angle.
Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
5 0

Answer:

(c) Stay the same

Step-by-step explanation:

Final angle will be same as initial angle. But length of lines will increase in both direction proportionally.

However any normal curve(closed or open ) will remain proportional to initial one. It is like a Zooming or magnifying of object.

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Rewrite y = -(x + 2)2 – 5 in standard form.
xenn [34]

Answer:

y = - x² - 4x - 9

Step-by-step explanation:

Given

y = - (x + 2)² - 5 ← expand (x + 2)² using FOIL

  = - (x² + 4x + 4) - 5 ← distribute parenthesis by - 1

  = - x² - 4x - 4 - 5 ← collect like terms

   = - x² - 4x - 9 ← in standard form

8 0
3 years ago
Chandra has some one dollar bills and some five-dollar bills in her wallet. She has 11 bills. The value of the bills is $39. Sol
blsea [12.9K]

Answer:

She has 7 $5 dollar bills and 4 $1 dollar bills.

Step-by-step explanation:

& times 5 plus 4.

6 0
3 years ago
100 POINTS!!!! Create a table of values for a linear function. A drone is in the distance, flying upward in a straight line. It
dangina [55]
Based on the docx you showed me, the equation for the parabola is y = x^2 + 36 and you want a table of values for a linear equation that intersects the parabola at (5, 6) and (-2, 34).

If you use these two points to create a line we get the equation:

y - 6 = \frac{34 - 6}{-2 - 5}(x - 5) (I just used point slope form)

This can be simplified to:

y = \frac{40}{-7}x + \frac{242}{7}

Now we just need to create a table of points on this line. We already have the points you gave and we can also use the y-intercept: (0, \frac{242}{7}) and the x-intercept: (\frac{121}{20}, 0).

So our table of value can be:

x          | y
______|________
-2         | 34
0          | 242 / 7
5          | 6
121/20 | 0
3 0
3 years ago
What's 90 increased by 60%
lozanna [386]

Answer:

144 <em>is the increased number.</em>

Step-by-step explanation:

<em>The first step would be to turn the percentage into a decimal. To do that, divide it by 100.</em>

60 / 100 = .6

Then, multiply that by 90.

.6 * 90 = 54

Add both together to get the increased price.

90+ 54 = 144

<em>:)</em>

5 0
3 years ago
Read 2 more answers
Can someone please help
Neko [114]

Answer:

a

Step-by-step explanation:

Well in the first you buy 5P+2B+3L

but then you buy 3P +1B+2L

and you add then up

6 0
3 years ago
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