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bearhunter [10]
2 years ago
12

A train leaves the station at time t = 0. Traveling at a constant speed, the train travels 390

Mathematics
1 answer:
maxonik [38]2 years ago
8 0

Answer:

a: D= 130T

B it is a linear function

Step-by-step explanation:

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I can buy 3 cans of soda for $1.05. How many cans can buy at the same rate for $21?
jek_recluse [69]

Answer:

20 cans

Step-by-step explanation:

Divide $21 by $1.05 and you get 20.

3 0
3 years ago
Read 2 more answers
Plz Hurry
Svetradugi [14.3K]

Answer:

B

Step-by-step explanation:

4 0
2 years ago
Let w=width and 4 + w=
kozerog [31]

Answer:

Part 1 : w^2+4w-60=0

Part 2 :

w=6

l = 10

Step-by-step explanation:

Part 1:

Let the width of the rectangle = w

Length of the rectangle = w + 4

Area of the rectangle is given as

60 Sq Yrds

60=w(w+4)

60=w^2+4w

w^2+4w-60=0

Hence this expression represents the area of the rectangle. Solving which for w will give us the width of the rectangle.

Part 2:

(w+10)(w-6)= 0

either (w+10) = 0

or

(w-6)=0

or both are zero

(w+10) = 0 ⇒ w = -10

not possible as the dimension can not be 0

(w-6)=0  ⇒ w=6

Hence the width is 6 yards

And thus the length will be 6+4 = 10 yards

8 0
3 years ago
ms. James has a 6 square foot bulletin board and a 12 square food bulletin board. She wants to cover both boards with index card
Anon25 [30]

Answer:

<em>She need </em><em>72 </em><em>index cards.</em>

Step-by-step explanation:

Ms. James has a 6 square foot bulletin board and a 12 square food bulletin board and she wants to cover both boards with index cards without gaps or overlaps.

Each index card has an area of \dfrac{1}{4} square foot.

Dividing the area of each board with the area of the index card will yield the the number of cards she needs to cover up completely.

Let us assume T₁ and T₂ are the number of cards she needs to cover 6 square feet food bulletin board and 12 square feet food bulletin board respectively. So

T_1=\dfrac{6}{\frac{1}{4}}=24,\\\\T_2=\dfrac{12}{\frac{1}{4}}=48

Therefore, in total she need 24+48=72 index cards.

7 0
3 years ago
Which expressions are equivalent to -3x+6v+7x14?
Greeley [361]

Between the 4 and the 7 is it a multiplication or an X?

If the multiplication sign, this is the solution

- 3x + 6v + 7 \times 14 \\  =    6v  - 3x + 98

8 0
2 years ago
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