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kykrilka [37]
2 years ago
11

Select the best answer for the question.

Mathematics
2 answers:
nadezda [96]2 years ago
7 0

Answer:

A

Step-by-step explanation:

because I said so.

Anvisha [2.4K]2 years ago
5 0

Answer:

the correct answer is option A

Step-by-step explanation:

(9-2)(-2)

(7)(-2)

=-14

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Mary ravi and Alan have a total of $62 in their wallets. Mary has $6 more than Ravi. Alan has 2 times what Mary has. How much do
mixas84 [53]

Answer:

Marry = $17

Ravi = $11

Alan = $34

Step-by-step explanation:

Let us assume

Mary be X

Ravi be Y

Alan be Z

So, the equation in total is

X + Y + Z = 62

It is given that

X = Y + 6

Z = 2X

Now we put the Z value in the total equation, so it would be

X + Y + 2X = 62

3X + Y = 62  .................................... (1)

And can we write

X = Y + 6

X - Y = 6 ................................. (2)

Now substitution these two equations,

3X + Y = 62

X - Y = 6

2X = 68

X = $17

So, Z = 2 × 17 = $34

And, Y

$17 + Y + $34 = $62

So, Y = $11

5 0
3 years ago
Question is 15 points
Blababa [14]

sin(x+y)=sin(x)cos(y)-cos(x)sin(y)

also, remember pythagorean rule, sin^2(x)+cos^2(x)=1

given that sin(Θ)=4/5 and cos(x)=-5/13

find sin(x) and cos(Θ)


sin(x)

cos(x)=-5/13

using pythagorean identity

(sin(x))^2+(-5/13)^2=1

sin(x)=+/- 12/13

in the 2nd quadrant, sin is positve so sin(x)=12/13


cos(Θ)

sin(Θ)=4/5

using pythagrean identity

(4/5)^2+(cos(Θ))^2=1

cos(Θ)=+/-3/5

in 1st quadrant, cos is positive

cos(Θ)=3/5


so sin(Θ+x)=sin(Θ)cos(x)+cos(Θ)sin(x)

sin(Θ+x)=(4/5)(-5/13)+(3/5)(12/13)

sin(Θ+x)=16/65



answer is 1st option

7 0
3 years ago
Given the equation f(x) = (x + 3)2 – 8, fill in the blanks: Axis of symmetry: x = _______a0 Vertex: ( _______a1, _______a2) Numb
frutty [35]

We have been given an equation f(x)=(x+3)^2-8.  We are asked to fill in the blanks using our given equation.

The axis of symmetry will be the vertical line passing through vertex.

First of all, we will convert our given equation in standard vertex form of parabola as:

Standard vertex form of parabola: y=(x-h)^2+k, where (h,k) is vertex of parabola.

f(x)=(x-(-3))^2-8

Upon comparing our function with standard vertex form, we can see that vertex of parabola is at (-3,-8).

The axis of symmetry will be vertical line passing through point (-3,-8). The vertical line will pass through x=-3, therefore, the axis of symmetry is x=-3.

Since our given parabola is an upward opening parabola, so it has a minimum at (-3,-8). This means that parabola will intersect the x-axis at two points. Therefore, there are two real solutions for the given function.

8 0
3 years ago
Please help its urgent!!!!
Elenna [48]

Answer:

A

Step-by-step explanation:

5 0
3 years ago
20 points! ;)
kaheart [24]
So,

The skateboard cost $67.
The protective helmet cost $25.

To find the percent that the price of the skateboard was out of the total amount, add 67 and 25 and divide 67 by the result.

Step 1:
67 + 25 = 92

Step 2:
67/92 = 0.728 or 72.8%.

The correct option is B.
3 0
3 years ago
Read 2 more answers
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