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3 years ago

Please solve this question

Mathematics

1 answer:

oee [108]3 years ago

4 0

Answer:

$\frac{1}{81}$

Step-by-step explanation:

Using the rule of exponents

$a^{-m}$ ⇔ $\frac{1}{a^{m} }$

Evaluating from the inside parenthesis outwards

$(-\frac{1}{3}) ^{2}$ = - $\frac{1}{3}$ × - $\frac{1}{3}$ = $\frac{1}{9}$ , then

$(\frac{1}{9}) ^{-2}$ = $\frac{1}{9^{-2} }$ = 9² = 81 , then

$(81)^{-1}$ = $\frac{1}{81}$

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A new auditorium is begging built for a college the balcony has 200 seats the floor has 25 rows with x seats in each row the num

aliya0001 [1]

Question:

A new auditorium is being built for a college. The balcony has 200 seats. The floor has 25 rows with x seats in each row. The number of people in the auditorium must be under 750 to meet safety regulations. What is the solution of this inequality, and what is its meaning?

Answer:

$200 + 25x < 750$

Number of seats in a row must be less than 22

Step-by-step explanation:

Given

Total = Less than 750

Current Seats = 200

Rows = 25

Seat per row = x

Required

Represent as an inequality

The scenario will be represented as:

$Current\ Seats + Rows * x = Total$

Substitute 200 for Current Seats

$200 + Rows * x = Total$

Substitute 25 for Rows

$200 + 25* x = Total$

$200 + 25x = Total$

Substitute <750 for Total.

The equation then becomes

$200 + 25x < 750$

Solving further:

$25x < 750 - 200$

$25x < 550$

$x < \frac{550}{25}$

$x < 22$

This means that:

Number of seats in a row must be less than 22

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3 years ago

What are the answers

Marta_Voda [28]

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3 years ago

Find the vertex of the function given below. Y=3x^2+6x+1

Natalka [10]

Answer:

Step-by-step explanation:

Given a parabola in standard form

y = ax² + bx + c ( a ≠ 0 )

Then the x- coordinate of the vertex is

x = - $\frac{b}{2a}$

y = 3x² + 6x + 1 ← is in standard form

with a = 3 and b = 6 , then

$x_{vertex}$ = - $\frac{6}{6}$ = - 1

Substitute x = - 1 into y for corresponding y- coordinate

y = 3(- 1)² + 6(- 1) + 1

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