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3 years ago

A truck traveled a distance of 280 kilometers in 4 hrs.

1 answer:

8 0

In this question, it is necessary to first check all the details that are already provided in the question. Then after they are noted down the final thing required is to find the answer to the question by correct calculations.
Distance for which the truck traveled = 280 kilometers
Time taken to travel the given distance = 4 hours.
Then
Speed of the truck = Distance traveled/Time taken
= 280/4 km/hr
= 70 km/hr
So the truck was traveling at a speed of 70 kilometers per hour. This is the answer to both the questions that have been put up. So there is no need for any kind of second calculation.

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Let a = 2i + 3, b= i – 1, and c= -3i + 2. Which expression is equivalent to a -b- c?A. –2i +4B. 4i + 2C. 4i + 4D. -2i + 2

34kurt

Given:

$\begin{gathered} a=2i+3 \\ b=i-1 \\ c=-3i+2 \end{gathered}$

You know that:

$a-b-c=(2i+3)-(i-1)-(-3i+2)$

In order to solve the operation, you can follow these steps:

1. Distribute the negative signs. Remember the Sign Rules for Multiplication:

$\begin{gathered} +\cdot+=+ \\ -\cdot-=+ \\ +\cdot-=- \\ -\cdot+=- \end{gathered}$

Then:

$=2i+3-i+1+3i-2$

2. Combine the like terms (add the Real Parts and add the Imaginary Parts):

$=4i+2$

Hence, the answer is: Option B.

3 0

1 year ago

5 is to 7 as is to 49

Ostrovityanka [42]

5 is to 7 as is to 49 is to 51

3 0

2 years ago

For the equation Y= 2(x+4)-3 what ordered pair what are used to start a graphing PLEASEEEE HELP

Anton [14]

Answer:

(4,-3)

Step-by-step explanation:

6 0

3 years ago

2818 people ferried to an island. If the ferry took 70 people in one trip, how many trips did the ferry make.

sasho [114]

Answer:

Step-by-step explanation:

Divide 2818 by 70 and it comes out to: 40.2571429 it is not 40 because their is still some left over so there will be 41 ferry's and one of them will not be a full ride!

5 0

2 years ago

What is the molarity of a solution

Vika [28.1K]

Answer:

0.670. M

Step-by-step explanation:

Molarity can be expressed like this:

molarity = number of moles /volume (L)

We know the volume, which is 2.37 L , but we need to find the number of moles. We can do this by dividing 67.3 g by the molar mass of L i C l :

number of moles = mass of sample /molar mass

number of moles = 67.3 g /(6.94 + 35.45) g/mol = 67.3 g /42.39 g/mol

number of moles = 1.59 mol

molarity = 1.59 mol /2.37 L = 0.670. M

7 0

2 years ago