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frez [133]
2 years ago
6

PLEASE HELP.

Mathematics
1 answer:
ELEN [110]2 years ago
8 0
The answer is False , hope this helps
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Find the indicated angle or side. Give an exact answer.<br> Find the measure of angle A in degrees.
Anna35 [415]

Step-by-step explanation:

law of cosine :

c² = a² + b² - 2ab×cos(C)

with c being the side opposite of C.

so, in our case

3² = 3² + 3²×3 - 2×3×3×sqrt(3)×cos(A)

0 = 3²×3 - 18×sqrt(3)×cos(A)

27 = 18×sqrt(3)×cos(A)

cos(A) = 27/(18×sqrt(3)) = 3/(2×sqrt(3)) =

= 0.866025404...

A = 30°

FYI : since it is an isoceles triangle, C = A = 30°.

and therefore B = 180 - 30 - 30 = 120°.

as the sum of all angles in a triangle is always 180°.

8 0
1 year ago
A metal alloy is 25% copper. Another metal alloy is 50% copper. How many grams of the 50% copper alloy should be used to make 10
Elis [28]
Well if the alloy makes the 1000 grams, but you are dealing with copper that isn't even 100% copper, than you either need 55% more copper, which isn't given, which means you really need 550 grams of alloy copper.
5 0
3 years ago
Where is 10/3 pi on the unit circle?
Tatiana [17]

Answer:

600 degrees

10pi/3 rad = 10pi/3 / pi × 180° = 600 degrees.

4 0
3 years ago
In the sahara desert one day it was 146 degrees F .in the Gobi desert the temperature of - 54 degrees f was recorded what is the
ankoles [38]

Answer:

200

146- (-54)= 200

or use a number line

7 0
3 years ago
what do you think the sum of the probabilities for all the possible outcomes must be for any situation. explain
raketka [301]
Let's pose this question a different way: what are the chances that one out of all possible events is going to happen? What are the chances that, if I roll a die, I will roll a 1, 2, 3, 4, 5, or a 6? What is the probability, if I flip a coin, that the outcome will either be heads or tails? When we take every possible outcome and add their probabilities together, the sum of the probabilities will be 100%, or 1.

Example:
Coin Toss:
Prob of Heads (.5) plus Prob of Tails (.5) = 1
Dice roll: 
1/6 (odds of rolling any given number) times 6 (number of possibilities) = 1
4 0
3 years ago
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