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marin [14]
3 years ago
10

What is the first step in evaluating the expression shown below? (12.9-3.1) 6.2-2 + 43

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

Answer:

Subtract 3.1 from 12.9

Hope it helped

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At Tech High there are three math teachers, Mary, Tom, and Alex. All students at Tech High take math, with 21% taking class with
galben [10]

Answer:

The probability that a Tech High student fails math is 0.1006

Step-by-step explanation:

21% students are taking class with Mary.

Every year 4% of Mary’s students fail,

15% students are taking class with Tom

Every year 6% of Tom’s students fail.

64% students are taking class with Alex

Every year 13% of Alex's students fail.

Now we are supposed to find the probability that a Tech High student fails math.

P(\text{Tech High student fails math}) = P(\text{taking class with Mary})\times P(\text{Mary students fail})+P(\text{taking class with Tom}) \times P(\text{Tom students fail})+P(\text{taking class with Alex}) \times P(\text{Alex student fail})

P(\text{Tech High student fails math}) = 0.21 \times 0.04+0.15 \times 0.06+0.64 \times 0.13

P(\text{Tech High student fails math}) =0.1006

Hence the probability that a Tech High student fails math is 0.1006

8 0
4 years ago
Please help❤️ Write an equation for the line through the points (9,5) and (6, 7) in point-slope form
yuradex [85]

Answer:

y = 5 -2/3 ( x-9)

Step-by-step explanation:

point slope form

y = y0 + m(x - x0).

m is the slope

m = (y2-y1)/(x2-x1)

     ( 7-5)/(6-9)

   2/-3

 =-2/3

The slope is -2/3

Using the point (9,5)

y = 5 -2/3 ( x-9)

4 0
3 years ago
Read 2 more answers
Tell whether (-4, 3) is a solution of the system of linear inequalities.
sergey [27]
<h3>Answer:  No, it is not a solution</h3>

Explanation:

Refer to the diagram below. The point (-4,3) marked in red is outside the blue shaded region. So it doesn't make both inequalities true, and therefore not considered a solution.

In contrast, a point like (-5,1) is a solution as it is in the shaded region.

Put another way, the set of all solution points must be below both the solid line and the dashed line. Points can be on the solid line, but must be adjacent to the blue shaded region. The fact (-4,3) is on the solid line doesn't count because its not below the dashed line.

4 0
2 years ago
What is the equation for the total cost
drek231 [11]
The correct answer is A
5 0
3 years ago
Solving quadratic equations by factoring <br> m(m-3)=0
KatRina [158]
Because it has already been factored, we can solve it straight away. Now, since m is a variable, we yield the same result if m = 0 or m = 3 because we have two components to this equation.

We can either have m = 0 or m - 3 = 0
Hence, m is either 0 or 3
6 0
3 years ago
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