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3 years ago

3 Select the correct answer. What are the solutions to this equation? 16x² + 9 = 25

Mathematics

1 answer:

Charra [1.4K]3 years ago

4 0

Answer:

Step-by-step explanation:

16x^2 + 9 = 25

16x^2 = 16

x^2 = 1

x = 1, -1

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Triangular tortilla chips have interior angles labelled A, B, and C. The measure of interior angle A is 90∘.If the measure of in

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3 years ago

The ratio of people to books in a classroom is 10:4 what is the unit rate of people per book

Alex73 [517]

Answer:

Unit rate of people per book = 2.5

Step by step explanation:

Given:

Number of peoples = $10$

Number of books = $4$

Their ratios = $10 : 4$

We have to find the unit rate of people per book.

To find out the unit rate of people per book we have to divide the total number of peoples by the total number of books.

For this we will follow the unitary method:

For $4$ book there are $10$ persons.

For $1$ book there will be $\frac{10}{4}$ persons.

So,

The numeric value = $\frac{10}{4}$

= $2.5$

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6 0

3 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

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2 years ago