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WITCHER [35]
2 years ago
15

If cosA=4/5 and cosB=3/5 then find a,b,c

Mathematics
2 answers:
dexar [7]2 years ago
4 0
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aliya0001 [1]2 years ago
3 0

Answer:

a = 3, b = 4, c = 5

Step-by-step explanation:

Assuming we're working with a right triangle, where c is the hypotenuse, then using the definition of the cosine being the adjacent side over the hypotenuse, then we know:

a = 3, because it is the side adjacent to B

b = 4, because it is the side adjacent to A

c = 5, because it is the denominator in bot fractions

This of course assumes that there is no additional ratio in place.  For example, if the lengths were instead 8, 6 and 10 respectively, then the cosines given would still be 4/5 and 3/5.  Truthfully these only tell relative sizes of the sides, and not their absolute sizes.

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y=-34

Step-by-step explanation:

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2 years ago
Three friends each have some ribbon Carol has 42 inches of ribbon title has 2.5 feet of ribbon and Baxter has 1.5 yards of ribbo
jolli1 [7]
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3 years ago
PLEASE HELP!!
beks73 [17]
<span>Let x = the width
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It says,"The length of a rectangle is 4 less than 3 times the width." write that as:
L = 3x - 4
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If the perimeter is 40, find the dimensions of the rectangle.
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We know: 2L + 2W = 40
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Substitute (3x-4) for L and x for W
2(3x-4) + 2x = 40
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6x - 8 + 2x = 40; Multiplied what's inside the brackets
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6x + 2x = 40 + 8; do some basic algebra to find x; (added 8 to both sides)

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8x = 48
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x = 48/8
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8 0
2 years ago
Read 2 more answers
(03.05 MC)Maya has $15 to spend. She spent $5.50, including tax, to buy a notebook. She needs to save $7.75, but she wants to bu
astraxan [27]

If Maya only has $15 dollars to spend and she buys a notebook for $5.50 then that leaves her with $9.50 and if she has to save $7.75 then that leaves her with $1.75 and since she wants to buy cookies then you have to figure out how many cookies she can get with $1.75 plus the tax but food doesn't have tax so she can buy 7 packages of cookies since there only 25 cents is right on point at $1.75 I hope I answered your question with all the calculating I had to do and the typing I went through to explain it to you !!!!!!!!!!!!!!!!!!!!!!!! now could you please give me a thank you and  hit the brain aster button please and thank you so much

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5 0
3 years ago
Read 2 more answers
I need some help plz ​
riadik2000 [5.3K]

Answer:

x = 7

Step-by-step explanation:

*set equations = to each other since they're corresponding angles which are equal to each other*

15x - 5 = 13x + 9 --> *subtract 13x from both sides*

2x - 5 = 9 --> *add 5 to both sides*

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x = 7

check:

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105 - 5 = 91 + 9

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5 0
3 years ago
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