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statuscvo [17]
2 years ago
15

Solve the system using elimination.

Mathematics
1 answer:
yan [13]2 years ago
8 0

Answer:

y=-3

Step-by-step explanation:

5x+7y=-31

(-) 5x-9y+17

-----------------

16y=-48

------------

16       16

y=-3

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The length of a rctangle is to more than the
hram777 [196]

Answer:

  19 m

Step-by-step explanation:

The width is 2 less than the length, so the perimeter is ...

  P = 2(L +W)

  72 = 2(L +(L -2))

  76 = 4L . . . . . . . . add 4

  19 = L

The length of the rectangle is 19 meters.

7 0
3 years ago
1/2 ху if x = 8, y = 3​
Sergeu [11.5K]

Answer:

12

Step-by-step explanation:

We just plug in 8 for x and 3 for y which gives us 1/2 * 8 * 3 = 12.

7 0
3 years ago
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If sin θ =8/9. Find cot θ.
olga nikolaevna [1]

Step-by-step explanation:

✧ \underline{ \underline{ \large{ \tt{G\: I \: V \: E\: N}}} }:

  • \large{ \tt{sin \:  \theta =  \frac{8}{9}}} Here , Perpendicular ( p ) = 8 & hypotenuse ( h ) = 9

♨ \underline{ \underline{ \large{ \tt{ T \: O \:  \: F \: I\: N\: D}}}} :

  • \large{ \tt{cot  \: \theta}}

♨ \underline{ \underline{ \large{ \tt{S \: O \: L\: U \: T\: I\: O \: N}}}} :

  • First, Find the base ( b ) using Pythagoras theorem :

☪ \boxed{ \bf{ {h}^{2} =  {p}^{2} +  {b}^{2}   }}

~Plug all the known values and then simplify!

⇾ \large{ \bf{ {9}^{2}  =  {8}^{2}  +  {b}^{2} }}

⇾ \large{ \bf{81 = 64 +  {b}^{2} }}

⇾ \large{ \bf{64 +  {b}^{2}  = 81}}

⇾ \large{ \bf{ {b}^{2}  = 81 - 64}}

⇾ \large{ \bf{ {b}^{2}  = 17}}

⇾ \large{ \bf{b =  \sqrt{17}}}

  • Now , Find the value of cot θ

We know ;

⟿ \large{ \bf{cot \theta =  \frac{b}{p}  =  \boxed{ \bf{ \frac{ \sqrt{17} }{8}}}}}

⤷ \boxed{ \boxed{ \underline{ \large{ \tt{Our \: Final \: Answer :  { \tt{ \frac{ \sqrt{17} }{8} }}}}}}}

( Correct me if I'm wrong )

Hope I helped ! ♡

Have a wonderful day / night ! ツ

☄ Let me know if you have any questions regarding my answer !

\underline{ \underline{ \mathfrak{Carry \: On \: Learning}}} !! ✎

▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁

7 0
2 years ago
Please need help on this no clue
trapecia [35]
The answer is D, happy graphing.
7 0
3 years ago
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A laptop that costs $250 is on sale with a 20% discount. What is the amount of discount? What’s the explanation to do this
mihalych1998 [28]

Answer: $50

Step-by-step explanation:

250 x 0.20 = 50

$50 discount

or you pay 80%, so

250 x 0.80 = 200

$200 final cost

$250 original cost - $200 final cost = $50 discount

3 0
3 years ago
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