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natali 33 [55]
3 years ago
10

2x +y when x= 3, y=1.

Mathematics
2 answers:
soldi70 [24.7K]3 years ago
8 0
I guessing 7 because 2(3)+1. 6+1=7
coldgirl [10]3 years ago
4 0

Answer:

I needed help on that question too

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What value is equivalent to 3 × 10 − 2(12 − 3 × 3)? A) -24 B) 24 C) 252 D) 756
Scrat [10]

Answer:

B) 24

Step-by-step explanation:

  • 3×10 - 2(12 - 9)
  • 3 × 10 - 2× 3
  • 30 - 6=24

8 0
3 years ago
A coral reef is 2 miles due south of its closest point along a straight shoreline. A visitor is staying in a cabin that is 4 mil
Goshia [24]

Answer:

5.54 miles

Step-by-step explanation:

1. Assume she runs up to a point that is x miles to the east of the coral reef:

distance running =

distance swimming =

2. Times:

time= distance / speed

time running =

time swimming =

3. Total time

time running + time swimming:  

             

4. Minimize time

The minimum time is when the derivative of the function of time is zero.

Find the derivative of T(x), using rule of the sum, the derivative of the sum is the sum of the derivatives, and the chain rule:

        

Solve for x:

         

5. Distance the visitor should run to minimize the time

Hence, the visitor should run 5.54 miles.

please mark me brainliest!

7 0
3 years ago
The math club is electing new officers. There are 5 candidates for president, 6 candidates for vice-president, 2 candidates for
Andre45 [30]

Answer:

180 different combinations

Step-by-step explanation:

To find the number of different combinations possible, We first find the number of possibilities for each place, and then multiply all possibilities.

Number of possibilities for president: 5

Number of possibilities for vice-president: 6

Number of possibilities for secretary: 2

Number of possibilities for treasurer: 3

Number of different combinations: 5*6*2*3 = 180

(We can form 180 different groups of 1 president, 1 vice-president, 1 secretary and 1 treasurer)

8 0
4 years ago
Read 2 more answers
Explain how you got it to please. Thank you!
vekshin1

add all the areas and n square units together i.e (23.85+29.4+26.25) in s.u.

8 0
4 years ago
If the discriminant of a quadratic equation is equal to -8, which statement describes the roots?
tia_tia [17]

Answer:

There are two complex roots.

Step-by-step explanation:

When the discriminant is a negative number, the parabola will not intersect the x-axis. This means that there are no solutions/two complex solutions.

4 0
3 years ago
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