All categories

2 years ago

Find C. Round to the nearest tenth

Mathematics

1 answer:

andre [41]2 years ago

5 0

Answer:

Step-by-step explanation:

c^2=a^2+b^2-2abcosC

cosC= (a^2+b^2-c^2)/(2ab)

C=arccos[(a^2+b^2-c^2)/(2ab)]

C=arccos(90^2+55^2-50^2)/(2(90)55)

C=arccos(8625)/(9900)

C=29.4 degrees

You might be interested in

Mariah makes bead necklaces. Beads are packaged in bags of 50 and bags of 200. Mariah bought 4 bags of 50 beads and 3 bags of 20

nalin [4]

Since she bought 4 bags of 50 beads and 3 bags of 200 beads you only need to use two operations: multiply and add. 4 x 50 is 200 3 x 200 is 600 600 + 200 = 800 Mariah purchase 800 beads in total.

6 0

2 years ago

Read 2 more answers

A person on tour has dollar 360 for his daily expenses. If he extends his tour for 4 days, he has to cut down his daily expenses

Greeley [361]

Answer:

The original duration of the tour is 18 days.

Step-by-step explanation:

Let

the number of days spent be T

Daily expenses be D

Initially ,

total tour expenses was 360

$D \times T=360$

$D = \frac{360}{T}$ -------------(1)

If he extends his tour for 4 days, he has to cut down his daily expenses by dollar 3

$(D + 4) \cdot(T -3) = 360$ ---------------(2)

Expanding the eqaution(2)

DT-3D + 4T -12 = 360

Substituting the value of D

$(\frac{360}{T})T -3( \frac{360}{T}) + 4T -12 = 360$

$(\frac{360}{T})T -3( \frac{360}{T}) + 4T= 360 + 12$

$(\frac{360}{T})T -3( \frac{360}{T}) + 4T= 372$

$360 - ( \frac{1080}{T}) + 4T= 372$

$( \frac{1080}{T}) + 4T= 372 - 360$

$( \frac{1080}{T}) + 4T= 12$

$1080 + 4T^2= 12T$

Solving the quadratic equation we get

T = 18 and T = -15

T is the number of gays and it cannot be negative , hence T is 18

Substituting in equation (1) we get

$D = \frac{360}{18}$

D = 20

4 0

3 years ago

Which expression is equivalent to 0.25(2d + 1) ? please help meh

wolverine [178]

Answer:

I think it is 0.50d + 0.25

PLZ CORRECT ME IF I AM WRONG PLEASE AND THANK YOU

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Please awnser in link below

xenn [34]

Answer:

You will get 13 groups.

Step-by-step explanation:

324 / 24 = 13.5 So there are 13 groups with 5 left over. Hope this helps.

8 0

2 years ago

Read 2 more answers

The profit of a cell-phone manufacturer is found by the function <img src="https://tex.z-dn.net/?f=y%3D2x%5E2%2B108x%2B75" id="T

Ne4ueva [31]

Answer:

The maximum will be 78

Step-by-step explanation:

8 0

2 years ago