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melomori [17]
3 years ago
12

Evaluate

Mathematics
1 answer:
Yuri [45]3 years ago
6 0

Answer:

what is this

Step-by-step explanation:

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The length of a rectangle is three times its width of the perimeter of the rectangle is 40 yd find its length and width
schepotkina [342]

Answer:

Step-by-step explanation:

L= 3W

Perimeter = 2(l+w) = 40

 

2(3w+w) = 40

 

2*4w = 40

8w =40

w = 5

l = 3*5 = 15

3 0
3 years ago
Express the following vector in the form v=v1i+v2j+v3k. 3u - v if u=(4,7,-3) and v=(2,-7,5).3u - v = ____ i + ____ j + _____ k.(
Alecsey [184]

Answer:

<h2><em>5i+14j-7k</em></h2>

Step-by-step explanation:

Given the vectors u = (4,7,-3) and v=(2,-7,5), both vectors are 3-dimensional in nature and can also be rewritten as;

u = 4i+7j-3k and v = 2i-7j+5k

To get 3u-v, we will substitute the given vectors into the expression;

3u-v = 3(4i+7j-3k) -  (2i-7j+5k)

open the parenthesis

3u-v = 12i+21j-9k - 2i + 7j - 5k

collect like terms

3u-v = (12i - 2i) + (21j + 7j) (-9k-5k)

3u - v = 10i+28j-14k

To simplify the answer, we will divide through by 2

3u - v = 10i/2+28j/2-14k/2

<em>3u - v = 5i+14j-7k</em>

<em>Hence the simplified form of the expression is 5i+14j-7k</em>

3 0
3 years ago
A factory is able to make 99 televisions in 3 hours. What is the constant of proportionality?​
Llana [10]

Answer: 33 televisions in 1 hour

Step-by-step explanation:

99/3=33

3 0
3 years ago
Read 2 more answers
You are driving from Kansas City to Denver. The distance (in miles) you
ad-work [718]

Answer:

The slope is 70

The slope represents the speed of your car

Step-by-step explanation:

The slope is 70, y = mx + c, where m is the slope

The slope represents the speed of your car

speed = distance/time

speed x time = distance

As y represents the distance you travel, x is the time, slope is the speed, you get the distance travelled.

5 0
3 years ago
I need the reasoning?
morpeh [17]

Answer:

2. This is only true when x=-3.

3. This is only true when x=3.

4. This is only true when x=12.

5. This has no solution.

6. This has an infinite number of solutions.

6 0
3 years ago
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