All categories

2 years ago

Evaluate the expression for x=5, y=3,and z=1/4. 5x−6y+20z/4yz

2 answers:

4 0

Just substitute each number into the expression:
5(5) - 6(3) + 20(1/4)/4(3)(1/4) = 25 - 18 + 5/3 = 7 + 5/3 = 26/3 or 8 and 2/3.

Semmy [17]2 years ago

3 0

5 * 5 - 6 * 3 + 20 * 1/4 / 4 * 3 * 1/4 = 7.9 i think its right
hope this helped

You might be interested in

I need help with this ASAP!!!!

Sedbober [7]

Answer:

wc ..3

Step-by-step explanation: prime

3 0

2 years ago

A random sample of 146 recent donations at a certain blood bank reveals that 81 were type A blood. Does this suggest that the ac

Tju [1.3M]

Answer:

We reject H₀ the actual percentage of type A donations differs from 40%

Step-by-step explanation:

Sample information:

sample size n = 146

Type A x₁ = 81 and p₁ = 81 / 146 p₁ = 0,5547

then q₁ = 1 - p₁ q₁ = 1 - 0,5547 q₁ = 0,4453

We choose as significance level α = 5% α = 0,05 α /2 = 0,025

from z-table we find z (c) = 1,96

National % of the population ( μ = 40 % μ = 0,4 )

Test hypothesis

Null hypothesis H₀ p₁ = μ

Alternative Hypothesis Hₐ p₁ ≠ μ

The Alternative hypothesis indicates that the test is a two-tail test

z(s) = ( p₁ - μ )/ √ p₁*q₁ / n

z(s) = ( 0,5547 - 0,40 )/ √ 0,5547*0,4453 / 146

z(s) = 0,1547 / 0,041

z(s) = 3,77

Comparing z(s) and z(c)

z(s) > z(c)

z(s) is in the rejection region. We reject H₀. Sample does not give evidence to support that the actual percentage of type A donations is equal to the national population

6 0

2 years ago

Car is moving on a circle on a plane. At time t (seconds), its x-coordinate is given by x(t) = 10 sin(200t + 3) + 30 while its y

Aleks [24]

Answer:

we have centre of circle as (30,40) and radius = 1

Step-by-step explanation:

Given that a car is moving on a circle on a plane.

At time t (seconds),

$x(t) = 10 sin(200t + 3) + 30$

and

$y(t) = 10 cos(200t + 3) + 40$

$x-30 = 10 sin(200t + 3) \\y-40 = 10 cos(200t + 3) + 40$

when we square and add both the equations we get

$(x-30)^2 + (y-40)^2 = 1$

(since sin square + cos square = 1 always)

i.e. we have centre of circle as (30,40) and radius = 1

3 0

2 years ago

Write a verbal expression for 5x cubed + 2

gladu [14]

Answer:

2 added to cube of 5 times x

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

Can someone help me .

RUDIKE [14]

Answer:

b part is the correct answer

3 0

2 years ago