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Molodets [167]
3 years ago
13

What is the value of the function v=3r-1 when r=-1?-8-426​

Mathematics
1 answer:
Lana71 [14]3 years ago
4 0

Answer:

-4

Step-by-step explanation:

v = 3(-1)-1 plug in -1 for r and multiply it by 3

v = -3-1 then combine like terms

v = -4

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At a high school, the probability that a student takes a science class and a history class is 0.48. The probability that a stude
Gnom [1K]
Solutions 

Probability: number of favourable outcomes
                   __________________________

                   total number of possible outcomes

In general, the total number of possible outcomes can be determined by multiplying the number of possible outcomes for each event. 

P(A|B)= \frac{P(A,B)}{P(B)} 

P(A|B) ⇒<span> P(taking history | taking science) , Therefore A corresponds to taking history, B corresponds to taking science. 
</span>
<span>P(A,B) will be the probability that a student is taking both of the subjects. 
</span>
<span>P(B) is the probability that a student is taking the subject science                       (regardless of whether he/she takes history or not)</span>

Now to solve the problem you plug in the given numbers. 

0.48 ÷ 0.82

<span>0.48 is the Probability of (A,B) and 0.82 is the Probability of (B) 
</span>
= 0.585<span>37 

Rounded to 0.59 

Answer = (D) </span>
4 0
3 years ago
A man buys a TV. The total cost is $2,500, and the sales commission is 8%. How much should the salesperson get as commission for
Margaret [11]

Answer:

$200

Step-by-step explanation:

First Change the percent to a decimal

In this case the percent was %8, change it into a decimal; 8%=.08

Next multiply 2,500 x .08  which gives you 200

The answer is $200! Hope this helps!.

5 0
3 years ago
Find the solution of this system of equations 10x-7y=-1 and -2x-7y=-25
Sergio039 [100]

Answer:

<h2>x = 2, y = 3 → (2, 3)</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}10x-7y=-1\\-2x-7y=-25&\text{change the signs}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}10x-7y=-1\\2x+7y=25\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad12x=24\qquad\text{divide both sides by 12}\\.\qquad x=2\\\\\text{Put it to the second equation}\\2(2)+7y=25\\4+7y=25\qquad\text{subtract 4 from both sides}\\7y=21\qquad\text{divide both sides by 7}\\y=3

8 0
4 years ago
May anybody help me with this iready diagnostics?
Maru [420]

Answer:

1/3

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
7. Hunter has a choice between 2 pizzas: a circular pizza with a 10-inch diameter, and a square pizza with a 9-inch side. Which
Otrada [13]

Answer:

  (b)  The area of the square pizza is larger

Step-by-step explanation:

The areas can be computed using the appropriate formulas, then compared.

__

<h3>circular pizza</h3>

  A = πr² . . . . . r = half the diameter

  A = π(5 in)² = 25π in² ≈ 78.5 in²

<h3>square pizza</h3>

  A = s² . . . . . s is the side length

  A = (9 in)² = 81 in²

The area of the square pizza (81 in²) is larger than that of the circular pizza (78.5 in²).

8 0
2 years ago
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