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AlekseyPX
3 years ago
9

Suppose 3 people each called 3 friends on the phone.

Mathematics
1 answer:
Usimov [2.4K]3 years ago
3 0

Answer: 3^3 x 3^3 x 3

Because 3x3x3x3x3=243

243 people were called all together.

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What is the area of this figure?<br><br> 56?<br><br> 90?<br><br> 146?<br><br> 216?
Taya2010 [7]
The area of the trapezoid is (1/2)(4+14)(10) = (5)(18) = 90.
The area of the triangle is (1/2)(14)(8) = 56.
Adding these, we get 56 + 90 = 146.
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Hope this helps!
==jding713==
3 0
3 years ago
Write two expressions that are equivalent to the expression below.<br> (9-0) + (9-c) + (9-c) + (9-C)
Nikolay [14]

Step-by-step explanation:

4(9 - c) \\  36 - 4c \\  an \: example \: of \: two \: equivalent \\ expression \: includes \:  \\ the \: general \: experssion \: \\   and \: then \: the \: one \: that \: \\  the \: one \: that \: is \: factured

4 0
3 years ago
Which inequality represents all values of x for which the product below is defined
zavuch27 [327]

Answer:

(-∞, -2) ∪ (0, ∞)

Step-by-step explanation:

Multiply together the (7x) and the (x+2), obtaining 7x^2 + 14x.  This is the correct argument (input) to Answer A.

Since the domain of the square root function includes "all real numbers equal to or greater than 0," we set 7x^2 + 14x = to 0.  This factors to the original 7x*(x+2), set equal to 0.  The roots are 0 and -2.  

These two values create three intervals:  (-∞, -2), (-2, 0) and (0, ∞).

Choosing test numbers, one from each interval:  {-5, -1, 1}.

7x^2 + 14x is + at x = -5, - at x = -1, and + at x = 1.

Thus, the domain of this function is  (-∞, -2) ∪ (0, ∞).  In other words, the product shown is defined on  (-∞, -2) ∪ (0, ∞).

5 0
3 years ago
Please help if possible due really soon thank you so so much ❤️❤️❤️
Nataly [62]

Answer:

C

Step-by-step explanation:

happy holidays!!!!!!!! love you u are strong and a true buddy

8 0
3 years ago
Please help with this question.
barxatty [35]

Answer:

Step-by-step explanation:

The first thing we have to do is find the measure of angle A using the fact that the csc A = 2.5.

Csc is the inverse of sin. So we could rewrite as

\frac{1}{sinA}=2.5 or more easy to work with is this:

\frac{1}{sinA} =\frac{2.5}{1}

and cross multiply to get

2.5 sinA = 1 and

sinA=\frac{1}{2.5} which simplifies to

sin A = .4

Using the 2nd and sin keys on your calculator, you'll get that the measure of angle A is 23.58 degrees.

We can find angle B now using the Triangle Angle-Sum Theorem that says that all the angles of a triangle have to add up to equal 180.  Therefore,

angle B = 180 - 23.58 - 90 so

angle B = 66.42

The area of a triangle is

A =\frac{1}{2}bh where h is the height of the triangle, namely side AC; and b is the base of the triangle, namely side BC. To find first the height, use the fact that angle B, the angle across from the height, is 66.42, and the hypotenuse is 3.9.  Right triangle trig applies:

sin(66.42)=\frac{h}{3.9} and

3.9 sin(66.42) = h so

h = 3.57

Now for the base.  Use the fact that angle A, the angle across from the base, measures 23.58 degrees and the hypotenuse is 3.9. Right triangle trig again:

sin(23.58)=\frac{b}{3.9} and

3.9 sin(23.58) = b so

b = 1.56

Now we can find the area:

A=\frac{1}{2}(1.56)(3.57) so

A = 2.8 cm squared

3 0
3 years ago
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