All categories

3 years ago

There are 12 sixth graders, 11 seventh

Mathematics

1 answer:

Ilya [14]3 years ago

5 0

Answer: 1

Step-by-step explanation:

because there not the only ones on the team

You might be interested in

While Brendan is vacationing with his family at the cabin, they take a motorboat on the river. The motorboat travels

taurus [48]

Part 1: The speed of the boat traveling downstream is $(18+w)$ miles per hr.

The speed of the boat traveling upstream is $(18-w)$ miles per hr.

Part 2: The speed of the current is 4 miles per hour.

Explanation:

Part (1): The motorboat travels 18 miles per hour in still.

Let w represents the speed of the current.

When the boat travels downstream, the speed of the current will get added to the speed of the boat.

Thus, the expression can be written as $(18+w)$ miles per hr

Hence, the speed of the boat traveling downstream is $(18+w)$ miles per hr.

When the boat travels upstream, the speed of the current will get subtracted to the speed of the boat.

Thus, the expression can be written as $(18-w)$ miles per hr.

Hence, the speed of the boat traveling upstream is $(18-w)$ miles per hr.

Part (2): The boat travels 49 miles upstream in the same time it takes to travel 77 miles downstream.

The distance formula is given by $distance $=$ speed $\times$ time$

Substituting, we have,

$49=(18-w)t\\49=18t-wt$ ---------------(1)

$77=(18+w)t\\77=18t+wt$ ---------------(2)

Solving using elimination method,

$49=18 t-w t\\77=18 t+w t\\-------\\126=36t$

Dividing both sides by 36, we have,

$t=3.5$

Substituting $t=3.5$ in $49=18 t-w t$ , we get,

$49=18(3.5)-w (3.5)\\$

$49=63-3.5w\\$

$-14=-3.5w\\$

$4=w$

Thus, the speed of the current is $w=4$ miles per hour.

5 0

3 years ago

Through: (1,0), slope=1

vitfil [10]

Standard form:
Y - 0= 1(x - 1)
Y - 0= x - 1
-x+y= -1
- (-x+y= -1)
Answer:
x-y=1

Slope-Intercept form:
Y - 0= 1(x-1)
Y - 0 = x - 1
Answer:
Y= x-1

4 0

3 years ago

Solve the equation, —9x + 1 = -x + 17 № ооооо пппп Noo

nika2105 [10]

Answer:

x = -2

Step-by-step explanation:

-9x + 1 = -x + 17

To solve this equation

Note if there is more than one variable like x, y, or z

Also note the power of the variables, for example, x^2 or y^3

In this equation, there is only one variable which is x and it's also in the power of 1 ie x

Step 1 : rearrange according to like terms

-9x + x = 17 - 1

( don't forget that the sign always change on crossing an equals to, either + to - or - to +

-9x + x (also means 9 - 1 but only carries a negative sign)

= - 8x = 16

Dividing both sides by -8 to get the value of x

-8x / 8 = 16 /- 8

x = 16/ -8

x = -2

5 0

3 years ago

How to write 1 2/5 as a percent

Tems11 [23]

140%

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

counters the B, C, D E are placed in a bag The table shows probabilities of picking each letter at random. Letter A B probabilit

enot [183]

A) The bottom section for D equals 0.34.

b) The top section for B equals 3/20 as a faction

7 0

3 years ago