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2 years ago

Solve the following question

Mathematics

1 answer:

emmasim [6.3K]2 years ago

5 0

Answer:

16 and 4

Step-by-step explanation:

Let (x+y) =20 and (x-y)=12 then:

Isolate for x in each equation

x=20-y and x=12+y

Set the equations to equal each other since the value of x should be the same for both

20-y = 12+y

Rearrange so that y is on one side and the numbers are on the other

8 = 2y

y= 8/2

y= 4

Now substitute the y- value back into either of the original equations

x+y= 20

x+4 = 20

Rearrange and isolate x

x = 20-4

x = 16

So the two values are 16 and 4

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there are 5 billiard balls in a velvet bag. three of the balls are striped and the other 2 are solid what's the probability of p

katrin [286]

$|\Omega|=5\\ |A|=3\\\\ P(A)=\dfrac{3}{5}$

4 0

3 years ago

I need help on this one asap pliz

Doss [256]

$C(5,4)(.40)^4(1-.40)^1=5(.4)^4(.6)^1=0.0768$

That's 7.68% = 7.7% (rounded)

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3 years ago

What positive number is left of 1 ( 0 is neutral)

kkurt [141]

Answer:

any number between 0 and 1

Step-by-step explanation:

This includes decimals.

8 0

3 years ago

Please explain every step

pogonyaev

<h3>Answer:</h3>

761680

<h3>Explanation:</h3>

$\sf \boxed{\sum _{n=1}^{44}\:60\left(1.2\right)^{n-2}}$

Identify the following's:

First Term [a] = 60(1.2)ⁿ⁻² = 60(1.2)¹⁻² = 50

Common ratio [r] = 1.2

Total Terms [n] = 44

===========================

$\sf Geometric \ Sum \ of \ Terms = \dfrac{a(r^n - 1)}{r-1}$

===========================

Solving Steps:

$\rightarrow \sf \dfrac{a(r^n - 1)}{r-1}$

$\rightarrow \sf \dfrac{50(1.2^{44} - 1)}{1.2-1}$

$\rightarrow \sf 761679.5808$

$\rightarrow \sf 761680 \ \ \ (rounded \ to \ nearest \ integer)$

8 0

2 years ago

Find the value of x and y

Natalija [7]

Hello and Good Morning/Afternoon:

Let's take this problem step-by-step:

What does the information want:

value of x
value of y

Let's gather some information:

ΔA'BC' and ΔABC are similar triangles

⇒ Angle B is shared by both triangles

⇒ Angle A' and A are the same, as they are both on parallel

lines, A'C' and AC, and both angles are formed with the

same line AB

⇒ by the Angle-Angle Theorem*, they are similar triangles

If they are similar triangles:

⇒ their side lengths are proportional to each other

let's find x's value

⇒ let's set up a proportion

$\frac{A'B}{AB} =\frac{A'C'}{AC} \\\frac{30}{x+30} =\frac{14}{22} \\14(x+30) = 30*22\\14x + 420 = 660\\14x = 240\\x = 17.143$

let's find y's value

⇒ let's set up a proportion

$\frac{BC'}{BC} =\frac{A'C'}{AC} \\\frac{y}{y+15} =\frac{14}{22} \\22y=14(y+15)\\22y=14y+210\\8y=210\\y=26.25$

Answer:

x= 17.143
y = 26.25

Hope that helps!

#LearnwithBrainly

5 0

1 year ago