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3 years ago

URGENT PLS HELP MAX POINTS

Mathematics

1 answer:

bija089 [108]3 years ago

6 0

Answer:

-103

243

Step-by-step explanation:

(q•r)(5) = q(r(5))

r(5) = 2(5²) + 1 = 51

q(51) = -2(51) - 1 = -103

(r•q)(5) = r(q(5))

q(5) = -2(5) - 1 = -11

r(-11) = 2(-11)² + 1 = 243

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Question

creativ13 [48]

The cost to cover the cirular region with mud is about $2940

<h3>How to calculate area?</h3>

The circumference of the circular region is about 157 feet. Hence:

circumference = 2π * radius

157 = 2π * radius

Radius = 78.5 / π

The area is given as:

Area = π * radius² = π(78.5 / π)² = 1961.5 ft²

Cost = $1.5 * 1961.5 = $2940

The cost to cover the cirular region with mud is about $2940

Find out more on area at: brainly.com/question/25292087

5 0

3 years ago

Express 9 as a ratio of 27

ANTONII [103]

Answer:

9/27 or 9 to 27

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

Use the "mixed partials" check to see if the following differential equation is exact. If it is exact find a function F(x,y) who

Arturiano [62]

We have

$(-3xy^2+y)_y=--6xy+1$

and

$(-3x^2y+x)_x=-6xy+1$

so the equation is indeed exact. So we want to find a function $F(x,y)=C$ such that

$F_x=-3xy^2+y$

$F_y=-3x^2y+x$

Integrating both sides of the first equation wrt $x$ gives

$F(x,y)=-\dfrac32x^2y^2+xy+f(y)$

Differentiating both sides wrt $y$ gives

$F_y=-3x^2y+x=-3x^2y+x+f_y\implies f_y=0\implies f(y)=C$

So we have

$F(x,y)=-\dfrac32x^2y^2+xy+C=C$

$F(x,y)=\boxed{-\dfrac32x^2y^2+xy=C}$

3 0

4 years ago

determine the value of , if possible. If the triangles are congruent, state which triangle congruence condition you used. If the

PilotLPTM [1.2K]

Answer:

"Can't be determined"

Step-by-step explanation:

From the triangles given in the picture,

Given:

m∠A = m∠C

m∠B = m∠D

But for the congruence of these triangles third condition is not given.

Therefore, congruence of these triangles can not be determined.

So the answer is "Can't be determined"

4 0

2 years ago

A company produces coffee makers. The labor cost of assembling one coffee maker during the regular business hours is $2.75. If t

Katena32 [7]

2.75 x + 3.55 y ≤ 2,479
x + y = 820
( x - number of units produced during the regular hours, y - number of units produced in overtime )
y = 820 - x
2.75 x + 3.55 · ( 820 - x ) ≤ 2.749
2.75 x + 2,911 - 3.55 x ≤ 2,749
- 0.8 x ≤ 2,749 - 2,911
- 0.8 x ≤ - 432 / · ( - 1 )
x ≥ 432 : 0.8
x ≥ 540
Answer:
The smallest number of units that must be assembled during the regular hours is 540.

6 0

4 years ago