2 years ago

Brainly if you can help me

Mathematics

1 answer:

Alex_Xolod [135]2 years ago

8 0

Answer:

(1, 6)

Step-by-step explanation:

Use elimination or substitution (elimination is easier)

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5-p=r-3 multi step equation

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Answer:

r+p=-8

Step-by-step explanation:

5-p=r-3

5+3-p-r=0

8-p-r=0

r+p=-8

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3 years ago

5. Each pair of polygons below are similar. Show your work! Solve for x:

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Answer:

x = 10

Step-by-step explanation:

30/35 = (6x-6)/63

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3 years ago

At the sewing store ashly bought a bag of mixed buttons she got 25 buttons in all 5 of the buttons were large what percentage of

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20%

Step-by-step explanation:

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3 years ago

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If Archie has 100 balls, and 18 of those balls are tennis balls, what percent of the total balls are tennis balls?

marishachu [46]

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D 18%

Step-by-step explanation:

18/100 = 18%so D is the answer

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2 years ago

Prove that sin²∅+cos²∅=1 ?

sasho [114]

Step-by-step explanation:

Let ABC be a right angled triangle where there's a right angle in B . Let the measure of the angle BAC be ∅. So,

$\sin(∅) = \frac{BC}{AC}$

$= > {\sin}^{2}∅ = \frac{ {BC}^{2} }{ {AC}^{2} }$

Also,

$\cos(∅) = \frac{AB}{AC}$

$= > { \cos}^{2}∅ = \frac{ {AB}^{2} }{ {AC}^{2} }$

Now adding the values of sin^2∅& cos^2∅,

${ \sin}^{2} ∅ + { \cos}^{2} ∅ = \frac{ {BC}^{2} }{ {AC}^{2} } + \frac{ {AB}^{2} }{ {AC}^{2} }$

$= > { \sin}^{2} ∅ + { \cos}^{2} ∅ = \frac{ {AB}^{2} + {BC}^{2} }{ {AC}^{2} }$

But we know that

${AC}^{2} = {AB}^{2} + {BC}^{2}$ by applying Pythagorean Theorem

So ,

$= > { \sin}^{2} ∅ + { \cos}^{2} ∅ = \frac{ {AC}^{2} }{ {AC}^{2} } = 1$

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2 years ago