Please help me!! ASAPPPLL

Marcia talks on the phone to Gabrielle for 1/3 of an hour How many minutes did she spend on the phone with Gabrielle

viva [34]

Answer:

20 minutes

Step-by-step explanation:

Theres 60 minutes in a hour so a third of that would be 20

4 0

4 years ago

PLEASE HELP ME If 0 < z ≤ 90 and sin(9z − 1) = cos(6z + 1), what is the value of z? z = 3 z = 4 z = 5 z = 6

Burka [1]

Answer:

z = 6

Step-by-step explanation:

We know that ...

sin(x) = cos(90 -x)

Substituting (9z-1) for x, this is ...

sin(9z -1) = cos(90 -(9z -1))

But we also are given ...

sin(9z -1) = cos(6z +1)

Equating the arguments of the cosine function, we have ...

90 -(9z -1) = 6z +1

90 = 15z . . . . . . . . . add (9z-1) to both sides

6 = z . . . . . . . . . . . . divide by 15

_____

<em>Comment on the graph</em>

The attached graph shows 5 solutions in the domain of interest. These come from the fact that the relation we used is actually ...

sin(x) = cos(90 +360k -x) . . . . . for any integer k

Then the above equation becomes ...

90 +360k = 15z

6 +24k = z . . . . . . . . . for any integer k

The sine and cosine functions also enjoy the relation ...

sin(x) = cos(x -90)

sin(9z -1) = cos(9z -1 -90) = cos(6z +1)

3z = 92 . . . . . equating arguments of cos( ) and adding 91-6z

z = 30 2/3

6 0

3 years ago

WiCH is equivalent to the expression below

Molodets [167]

Answer:

2.705

Step-by-step explanation:

reduce your fractions

2 + 7/10 + 1/200

541/200 = 2.705

6 0

3 years ago

Read 2 more answers

What is the equation of the line that passes through the point (6, 8) and has a slope 1/2

Korvikt [17]

Answer:

y=1/2x+5

Step-by-step explanation:

Plug it into the formula for a point and a slope.

(y-(y(subscript 1)))=(m)(x-(x(subscript 1)))

Y-8=1/2(x-6)

Then multiply the 1/2 to the x and -6. After you do that, move everything so that it has y by itself on the left. Your ending should be y=1/2x+5.

7 0

3 years ago

I need both 17 and 18 please

wolverine [178]

Answer:

17. 37

18. 10

Step-by-step explanation:

Use the formula a squared + b squared = c squared. (a^2 + b^2 = c^2)

For number 17 first square both your side lengths of 12 and 35 to get 144 and 1225.

Then add them together to get 1369. That is your c^2 but now you have to find the square root to get your side length of c. Once you find the square root of 1369 you should get an answer of 37 for your missing side.

Using the same formula of a^2 + b^2 = c^2 you square the two side you’re given and get 576 + b^2 = 676

Since it gives you your a and c side lengths all you do is subtract your a from your c (676 - 576) to get 100 which is your b^2. Then you find the square root of 100, which is 10 because 10 times itself is 100, you’ll have your b side length of 10

3 0

3 years ago