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Bezzdna [24]
3 years ago
14

What is the measure of Select one: A. 57° B. 63° C. 111° D. 101°

Mathematics
1 answer:
vekshin13 years ago
4 0
I think it is a)57 because 84-27=57 or b because it is less than 90
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Solve the equation x2 + 64 = 100
anyanavicka [17]

Answer:

x = ± 6

Step-by-step explanation:

Given

x² + 64 = 100 ( subtract 64 from both sides )

x² = 36 ( take the square root of both sides )

x = ± \sqrt{36} = ± 6

7 0
3 years ago
Consider the function f(x)=-3x^2 +7x -k. [3 Marks] a) For what values of k will the function have no zeros? b) For what values o
Anna35 [415]

Answer: a) k >4.08

b) k = 4.08

c) k<4.08

Step-by-step explanation:

Since we have given that

f(x)=-3x^2+7x-k

a) For what values of k will the function have no zeros?

It mean it has no real zeroes i.e. Discriminant < 0

As we know that

D=b^2-4ac

Here, a =-3

b = 7

c = -k

So, it becomes,

D

b) For what values of k will the function have one zero?

It means it has one real root i.e equal roots.

So, in this case, D = 0

So, it becomes,

D=b^2-4ac=0\\\\D=7^2-4\times -3\times -k=0\\\\49-12k=0\\\\49=12k\\\\k=\dfrac{49}{12}\\\\k=4.08

c) For what values of k will the function have two zeros?

It means it has two real roots.

In this case, D>0

So, it becomes,

D=7^2-4\times -3\times -k>0\\\\49-12k>0\\\\-12k>-49\\\\12k

Hence, a) k >4.08

b) k = 4.08

c) k<4.08

3 0
3 years ago
FOR WHICH POLYGON ARE BOTH x= -1 and y= -2 lines of symmetry? ILL BRAINLIEST YOU IF YOU GET IT RIGHT HELP ME PLZ
snow_lady [41]

Answer:

C

Step-by-step explanation:

The line of symmetry is a line that splits the figure into 2 halves where each half is a mirror image of the other. In the third figure, if a line is drawn through x = -1, the halves mirror each other. If a line is drawn through y = -2, the top and bottom halves mirror each other.

3 0
2 years ago
Giving brainliest 10 points if you answer correctly !!!!
inn [45]

Answer:

(2,4) I hope this helps :))

3 0
2 years ago
The cost of a postage is determined by the following step function: How much would a package that weighs 3 ounces cost, in cents
bija089 [108]

Answer:

I think its C) 43. Let me know what you get

4 0
3 years ago
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