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sineoko [7]
3 years ago
6

A boat travels at constant speed. After 20 minutes the boat had traveled 2.5 miles. What is the boat's speed (in miles per hour)

?
Mathematics
1 answer:
Arisa [49]3 years ago
7 0

Answer:

8mph

Step-by-step explanation:

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A culture started with 5,000 bacteria. After 4
Lisa [10]

Answer:

5000 * (e^((1 /4) * ln(55 / 50) * (13))) = 6,815.47

Step-by-step explanation:

7 0
3 years ago
Fill in the missing work and justification for step 3 when solving 2(x + 1) = 10.
kirill115 [55]

Answer:

2(x + 1) = 10

x = 4

Step-by-step explanation:

Given:

2(x + 1) = 10

Solution:

Apply Distributive property

A*(B+C) = (A*B) + (A*C)

This means multiply 2 with x and 1

2*(x+1) = (2*x) + (2*1)

2x + 2 = 10      

Use Subtraction property of equality

A = B, then A - C = B - C

Subtracting 2 from both sides:

2x + 2 - 2 = 10 - 2

2x = 8                  Step 3

Use Division property of equality

It state that if you divide both sides of an equation by same nonzero number then the sides remain equal

Dividing both sides by 2

2x/2 = 8/2

x = 4

This means value of x is 4

Another method to solve this equation is:

2(x+1)=10  

Use Distributive property

A*(B+C) = (A*B) + (A*C)

2*(x+1) = (2*x) + (2*1)  

2*(x+1) = 2x + 2  

Use commutative property

A + (-B) = (-B) + A

2x + 2 + (-2) = 2x + (-2) + 2

2x + 2 + (-2) = 10 + (-2)

2x + 2 - 2 = 10-2  

2x = 8  

Using division property

AX = B  

AX / A = B / A

So

X = B/A

This becomes:

2x = 8

2x = 8.

Divide both sides by 2  

2x / 2 = 8 / 2  

x = 4

3 0
3 years ago
Can someone please help!!
leva [86]

Answer:

Step-by-step explanation:

the last one

8 0
3 years ago
What is the derivative of Y =x√(2x + 1)/e^xsin^3(x).?
blagie [28]
-\dfrac{\mathrm{e}^{-x}\left(\left(2x^2-2x-1\right)\sin\left(x\right)+\left(6x^2+3x\right)\cos\left(x\right)\right)}{\sqrt{2x+1}\sin^4\left(x\right)}.
3 0
3 years ago
What is twice 2 to the 30 power ? Write using exponents. Explain your reasoning
Rus_ich [418]

2 times 2^30 simple means that = (2^1) x (2^30)

<span>In multiplying numbers of the same base (in this case 2), the exponents are just added, therefore giving us:

</span>

(2^1) x (2^30) = (2^31)

 

Answer:

<span>2 to the 31 power</span>

4 0
3 years ago
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