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3 years ago

What is the answer???

Mathematics

2 answers:

natima [27]3 years ago

7 0

What he said. Lol mb

Greeley [361]3 years ago

6 0

Answer:

Angles in ascending order:

Q, R, S

Step-by-step explanation:

The side with the biggest number also has the biggest angle degree. The side with the smallest number also has the smallest angle degree.

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What is the solution of the system x − 3y = –13 and 5x + 7y = 34? A. `x = (6)/(5)`, y = 4 B. `x = (7)/(2), y = (9)/(2)` C. `x =

Masteriza [31]

For this case we have the following system of equations:

$x-3y = -13\\5x + 7y = 34$

From the first equation we clear "x":

$x = -13 + 3y$

We substitute in the second equation:

$5 (-13 + 3y) + 7y = 34$

We apply distributive property:

$-65 + 15y + 7y = 34$

We add similar terms:

$-65 + 22y = 34$

We add 65 to both sides:

$22y = 34 + 65\\22y = 99$

We divide between 22 on both sides:

$y = \frac {99} {22}\\y = \frac {9} {2}$

We look for the value of the variable "x":

$x = -13 + 3 \frac {9} {2}\\x = -13 + \frac {27} {2}\\x = \frac {-26 + 27} {2}\\x = \frac {1} {2}$

Thus, the solution of the system is:

$(x, y): (\frac {1} {2}, \frac {9} {2})$

ANswer:

$(x, y): (\frac {1} {2}, \frac {9} {2})$

5 0

3 years ago

Read 2 more answers

From the top of a building, 40 feet above the ground, a construction worker locates a rock at a 12° angle of depression. How far

MA_775_DIABLO [31]

Answer:

188 m

Step-by-step explanation:

$\tan(12) = \frac{40}{x} \\ x = \frac{40}{ \tan(12) } \\ x = 188$

6 0

3 years ago

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Find sin (A-B) if sin A = 4/5 with A between 90 and 180 and if cos B = 3/5 with B between 0 and 90

quester [9]

Answer:

sin(A-B) = 24/25

Step-by-step explanation:

The trig identity for the differnce of angles tells you ...

sin(A -B) = sin(A)cos(B) -sin(B)cos(A)

We are given that sin(A) = 4/5 in quadrant II, so cos(A) = -√(1-(4/5)^2) = -3/5.

And we are given that cos(B) = 3/5 in quadrant I, so sin(B) = 4/5.

Then ...

sin(A-B) = (4/5)(3/5) -(4/5)(-3/5) = 12/25 + 12/25 = 24/25

The desired sine is 24/25.

3 0

3 years ago

Help and explain Don’t use for points or will be reported and I’ll take it back

Fittoniya [83]

Answer:

86+34+x=180

x=180-120

x=60

Hope it helps

4 0

3 years ago

Help, please!!! Simplify this expression. -18x(3-4.6)-10x

koban [17]

Answer:

-28x(-1.6)

Step-by-step explanation:

combine like terms: -18x +(-10x) ---> -28x

3-4.6 ---> -1.6

Combine the leftover terms:

-28x(-1.6)

7 0

4 years ago