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2 years ago

Plz help !!!!!!!!!!!!

Mathematics

2 answers:

Nutka1998 [239]2 years ago

4 0

Answer:

c. 1/4 or 25% or 0.25

Step-by-step explanation:

Rashid [163]2 years ago

4 0

Answer:

C 1/4

Step-by-step explanation:

When the bases are the same, we can add the exponents

x^a * x^b = x^ (a+b)

4^2 * 4^(-3)

4^(2-3)

4^(-1)

The negative exponent puts it in the denominator

1/4

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There is a number such that four times the number plus 3 is equal to 19. Find the number

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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

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