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myrzilka [38]
3 years ago
7

A motorboat left a harbor and traveled to an island at an average rate of 10 knots. The average speed on the return trip was 10

knots. If the total trip took 4.0 hours, how far is the harbor from the island?
Mathematics
1 answer:
Illusion [34]3 years ago
5 0

Answer:

A on edu2020

Step-by-step explanation:

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9.
olga nikolaevna [1]

Answer:

the answer is 18 cm

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
-1(x+5)=3[x+(2x-1)]<br> solved and justified each step
madreJ [45]

Answer:

<h2>x = -0.2</h2>

Step-by-step explanation:

-1(x+5)=3[x+2x-1)]\\\\\text{for}\ -1(x+5):\ \text{distribtutive property}\\\text{for}\ [x+(2x-1)]:\ \text{associative property}\\\\(-1)(x)+(-1)(5)=3[(x+2x)-1]\\-x-5=3(3x-1)\\\\\text{for}\ 3(3x-1):\ \text{distributive property}\\\\-x-5=(3)(3x)+(3)(-1)\\-x-5=9x-3\\\\\text{for the equation}:\ \text{addition property of equality}\\\\-x-5=9x-3\qquad\text{add 5 to both sides}\\-x-5+5=9x-3+5\\-x=9x+2\\\\\text{for the equation:}\ \text{subtraction property of equality}\\\\-x=9x+2\qquad\text{subtract}\ 9x\ \text{from both sides}

-x-9x=9x-9x+2\\-10x=2\\\\\text{for the equation:}\ \text{division property of equality}\\\\-10x=2\qquad\text{divide both sides by -10}\\\dfrac{-10x}{-10}=\dfrac{2}{-10}\\x=-0.2

\text{Distributive property:}\ a(b+c)=ab+ac\\\text{Associative property:}\ (a+b)+c=a+(b+c)

6 0
3 years ago
What is the value of x 55,105<br> A.50<br> B.20<br> C.160 <br> D.55
Ann [662]

Answer:

c)55

Step-by-step explanation:

7 0
3 years ago
-9(-3 1/3 - 4) how do I solve that math problem?
svetoff [14.1K]
You need to use the distributive property. So you take the -9 from outside the parentheses and multiply itself by the numbers inside.
3 0
2 years ago
4. Angela baked 24 cookies and gave 16 of
viktelen [127]

Answer:

2/3

Step-by-step explanation:

Idk about the number line circling thing but here is the explanation.

if you see how many out of 24 cookies Angela gave, you see that she gives 16. This is equal to 16/24, which simplifies to 2/3.

Thus, Angela gives 2/3 of her cookies to her neighbor.

5 0
2 years ago
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