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Julli [10]
3 years ago
9

Help me i'm lost :( please i have exam!:(

Mathematics
1 answer:
Rzqust [24]3 years ago
3 0

Answer:

1.9y

Step-by-step explanation:

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Evaluate the expression 8a+b for the given variable. b=3a-2
Marina CMI [18]
8 x a = 8 x (-2) = -16 

-16 + b = -16 + 3 = -13 

-13 is the answer 
3 0
3 years ago
A. Graph A<br> B. Graph B<br> C. Graph C<br> D. Graph D
FromTheMoon [43]

Answer: graph A

explanation: srry if im not much help im new to this

5 0
3 years ago
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Three quarters of the batch of twenty cookies burned when you forgot to take them out of the oven?how many cookies burned?
a_sh-v [17]
15 cookies burned. 3/4 Is equal to 75% so you want to take 75% of 20. OF always mean multiply, but first we divide by 100 to get it into a decimal so 0.75 X 20 equals 15 (if you punch into calculator) so only 5 cookies are not burned. but the 3/4 that for burnt were the other 15
7 0
4 years ago
suppose x is a non-negative integer valued random variable which follows a probability distribution such that p x=0 = 06 and for
Andre45 [30]

Not sure if the given probability that X=0 is 0.06 or 0.6, or something else altogether. I'll just refer to it by the number p.

\begin{cases}P(X=0)=p\\P(X=i+1)=\frac15P(X=i)&\text{for }i\ge1\end{cases}

As is, the probability that X=1 is indeterminate, so I think you intended to write

\begin{cases}P(X=0)=p\\P(X=i+1)=\frac15P(X=i)&\text{for }i\ge\boxed{0}\end{cases}

Then by this definition,

i=0\implies P(X=1)=\dfrac15P(X=0)=\dfrac p5

i=1\implies P(X=2)=\dfrac15P(X=1)=\dfrac p{5^2}

and so on.

Then

\boxed{P(X\le2)=P(X=0)+P(X=1)+P(X=2)=p+\dfrac p5+\dfrac p{5^2}=\dfrac{31p}{25}}

6 0
4 years ago
An equilateral triangle with side lengths of 8.7 centimeters is shown. An apothem has a length of a and the radius has a length
shutvik [7]

Options A,B and D. The correction about the area of the triangle are

  • The apothem can be found using the Pythagorean theorem.
  • The apothem can be found using the tangent ratio.
  • The length of the apothem is approximately 2.5 cm.

<h3>How to solve for the length of the Apothem using the Pythagoras theorem</h3>

Firstly this is an equilateral triangle

3 of the sides have the length of 8.7cm

b = half of 8.7

= 4.35cm

To get A we have

a² + b² = c²

a² + 4.35² = 5²

When we solve this out we would have

a² = 25 - 18.9225

a ≈ 2.5 cm.

Hence we have proved that the first option is correct.

<u>For B,</u>

In an equilateral triangles, each of the angles = 60 degrees

60/2 = 30 is the angle that is made from the base

<h3>using tangent ratios </h3>

a / 4.35 = tan 30

then a = 4.35 tan 30

This would also give us an approximate of 2.5

For D

The calculations we have done based on the statements in A and B shows that D is correct as 2.5.

Read more on triangles here:

brainly.com/question/18404158

#SPJ1

7 0
2 years ago
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