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scoundrel [369]
3 years ago
11

Please help me with this math!

Mathematics
1 answer:
lidiya [134]3 years ago
8 0

Answer:

9. (-∞, ∞)

10. (-∞, 3)U(3,∞)

11. (-∞, -3)U(-3,1)U(1, ∞)

12. (-∞,0)U(0,3)U(3, ∞)

13. (-∞,0)U(0,5)U(5, ∞)

14. (-∞,3)U(3, ∞)

15. (not sure)

16. [-4,0]U[0,4]U[4,∞)

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This is about angles. Please answer someone?
NISA [10]
Actually, this is not about angles.  It's about the length of the sides in a right triangle.

In EVERY right triangle, the squares of the lengths of the short sides add up
to the square of the length of the longest side.  You're in high school math,so
I'm SURE you've heard that in class before ... possibly even just before you
were assigned this problem.

Let's say that again:  The squares of the lengths of the sides that meet at
the  right angle add up to the square of the length of the longest side.  In
the triangle in this particular problem, that means
                                                                             a² + b² = c²

You know the lengths of 'b' and 'c', so you shouldn't have any trouble finding
the length of 'a'.
4 0
4 years ago
The following picture is a square pyramid where DE=8 cm and m∠ADE=60°.
mr_godi [17]

Answer:

131 cm

Step-by-step explanation:

formula for surface area of pyramid is

S = (1/3)Bh

but the base ia a square, so B = x^{2}

S = (1/3)x^{2} h

the pic shows h = 8

but we don't know x

do SohCahToa

sin60 = x/8

x = 8sin60

x = 6.92820323 or 7

plug in numbers

S = (1/3)7^{2}8

S = 392/3

S = 130.6666667 or 131 cm

5 0
3 years ago
One band was paid $14000 for a concert​
aniked [119]

Answer:

cool, but what is the question?

6 0
3 years ago
Barbara sells iced tea for $1.49 per bottle and water for $1.25 per bottle she wrote an equation to find the number of bottles s
Ann [662]

Answer:

She did a multiplication, i think she should have substracted both numbers to 100 and divide it by 1.25 or 1.49

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
A student has 3 pounds of fudge. she eats 1 pound of it.how many ounces does she have left.
lys-0071 [83]
Remaining pounds;
3-1=2 pounds
1 pound=16 ounces
2 pounds=32 ounces
She has 32 ounces remaining
4 0
4 years ago
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