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madreJ [45]
3 years ago
5

Solve a system of equation by elimination

Mathematics
1 answer:
maks197457 [2]3 years ago
6 0

Answer:

1: (4,1) x=4 y=1

2: (1,10) x=1 y=10

3: (-25/4,5) x= -25/4 y=5

Step-by-step explanation:

It would be a lot to explain all three so if you really need it just ask

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Please help! BRAINLIEST to correct answer!!
Nadusha1986 [10]

Answer:

its b im not sure

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Cristina is sending out thank you cards for birthday presents. She has pink (P), blue (B), and green (G) cards, and white (W) an
Brut [27]

Answer:

PW, BW,  GW, PY,  BY, GY

Step-by-step explanation:

We need to determine the sample space

pink(P), blue (B), and green (G) cards,   (W) and yellow (Y) envelopes

Each color card can match with each color envelope

Start with the white envelopes and each color card

and then the yellow envelopes with each color card

PW   BW  GW

PY  BY   GY

3 0
4 years ago
Justin is using the figure shown below to prove Pythagorean Theorem using triangle similarity: In the given triangle ABC, angle
Natali [406]

Option fourth "By the addition property of equality, AC² plus AB² = BC multiplied by DC plus AB² is correct.

<h3>What is the Pythagoras theorem?</h3>

The square of the hypotenuse in a right-angled triangle is equal to the sum of the squares of the other two sides.

The figure is missing.

The right-angle triangle is shown in the picture; please refer to the picture.

The missing options are attached; please refer to the picture.

We have a right-angle triangle shown in the picture.

The larger triangle ABC is similar to the smaller triangles as follows.

ΔABC ~ ΔDBA     (By AA similarity)

ΔABC ~ ΔDAC   (By AA similarity)

From the above similarity:

AC² or AB²

\rm \dfrac{AB}{BD} = \dfrac{BC}{AB}

After cross multiplication:

AB² = BC×BD

Now,

\rm \dfrac{AC}{CD} = \dfrac{BC}{AC}

AC² = BC×BD

AB² + AC² =  BC×BD + BC×BD

AB² + AC² =  2BC×BD

Thus, the option fourth "By the addition property of equality, AC² plus AB² = BC multiplied by DC plus AB² is correct.

Learn more about Pythagoras' theorem here:

brainly.com/question/21511305

#SPJ1

6 0
2 years ago
Virgil has one sixth of a birthday cake left over he wants to share the leftover cake with 3 friends what fraction of the origin
marta [7]
1/10 hope it helps you out
8 0
4 years ago
1. Find the exact value by using a half-angle identity. (1 point)
amm1812
<span>1. Find the exact value by using a half-angle identity. 
sin 22.5°
</span>

Using the half angle formula you get:
<span><span><span><span>sin2(</span>θ)=12<span>[1−<span>cos(2</span>θ)]</span></span>
</span>if </span><span><span>θ=22.5°</span> then </span><span><span><span>2θ=45°</span>
</span>so you get:
</span><span><span><span>sin2(22.5°)</span>=12<span>[1−<span>cos(45°)</span>]</span></span>
</span><span><span><span><span><span>sin2(22.5°)</span>=12[</span><span>1−<span>√2/2]</span><span>=<span><span>2−√2</span>4</span>
</span></span></span>and square root both sides:
</span><span><span><span><span><span>sin(22.5°)</span>=±</span><span>√<span><span>2−√2</span>4</span>=±0.382</span></span>
</span>so </span></span>

<span> sin(22.5°)=0.382the answer is the letter D) one half times the square root of quantity two minus square root of two

</span>

<span>2. Verify the identity.

cot x minus pi divided by two. </span>= -tan x

Cot(x-pi/2)=-tan(x)

 sin(A − B) = sin A cos B − cos A sin B

sin(x – pi/2) = sin x cos (pi/2) − cos x sin (pi/2)=-cosx

 

cos(A − B) = cos A cos B − sin A sin B

cos(x− pi/2) = cos x cos pi/2 − sin x sin pi/2=-sinx

 Cot(x-pi/2)=cos(x-pi/2)/sin(x-pi/2)

<span>= (-sinx)/(-cosx)=-tanx--------------ok</span>

4 0
3 years ago
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