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3 years ago

What is 9% of 80? I really need help I’m failing math class

Mathematics

2 answers:

bogdanovich [222]3 years ago

4 0

Answer:

7.2

Step-by-step explanation:

good luck hope it helps

kozerog [31]3 years ago

3 0

Step-by-step explanation:

To find 9% of 80 you multiply 80 and 0.09(I converted 9% to 0.09).

80x0.09=7.2

Hope it helps!

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Please help me with this

Alisiya [41]

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3 years ago

The number of text messages sent daily by a student is a poisson random variable with parameter λ=5 .in a class with 20 independ

Rudik [331]

This problem is a combination of the Poisson distribution and binomial distribution.

First, we need to find the probability of a single student sending less than 6 messages in a day, i.e.
P(X<6)=P(X=0)+P(X=1)+P(X=2)+P(X=3)+P(X=4)+P(X=5)
=0.006738+0.033690+0.084224+0.140374+0.175467+0.175467
= 0.615961

For ALL 20 students to send less than 6 messages, the probability is
P=C(20,20)*0.615961^20*(1-0.615961)^0
=6.18101*10^(-5) or approximately
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7 0

4 years ago

Tell whether the lines of the pair of equations are parallel, perpendicular, or neither.

tino4ka555 [31]

First Equation:

$y= -\frac{3}{4} x+2$

Second Equation can be written as:

$y= \frac{3}{4}x+2$

Slope of first equation is -3/4 and slope of second equation is 3/4.
Slope of parallel lines must be equal, and slope of perpendicular lines are the negative reciprocal of each other. None of these conditions can be seen for given two equations.

So, the two lines are neither parallel nor perpendicular.
So correct option is C

7 0

4 years ago

Read 2 more answers

Simplify and write the trigonometric expression in terms of sine and cosine:

asambeis [7]

Answer:

we have the expression as;

1/sin u cos u

Step-by-step explanation:

tan u = sin u/cos u

cot u = cos u/sin u

Thus;

sin u/cos u + cos u/sin u

The lcm is sin u cos u

Thus, we have that;

(sin^2 u + cos^2 u)/sin u cos u

But ; sin^2 u + cos^2 u = 1

so we have ;

1/sin u cos u

4 0

3 years ago

Arthur walked around a circular trail twice in a total of 4.5 hrs. He walked the circle at 4 mph the first time and at 5 mph the

Alex

Answer:

It’s 5 mph I would be tired if I had to walk 4 miles

Step-by-step explanation:

3 0

2 years ago