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2 years ago

Help please asap!! no links please

Mathematics

2 answers:

Neporo4naja [7]2 years ago

5 0

Answer:

A. 600

B. 565.2

C. 8000

D. 8125.376

Step-by-step explanation:

Rounding up from 500 is 600 (Nearest HUNDRED)

Rounded up from 565.234 is 565.2 (NEAREST TENTH)

Rounded down from 8125.3758 is 8000 (NEAREST THOUGHAND)

Rounded up from 8125.3758 is 8125.376 (NEAREST THOUSANDTH)

DENIUS [597]2 years ago

4 0

Answer:

Step-by-step explanation:

a) 565.234

If you want to round to hundred, see the ten's place. If in tens place the number is 5 or more than 5, then add to 1 to the hundred's place

Here ten's place = 6 > 5.

So, 600

b) tenths

564.2

c) 8125.3758

Round to thousand ⇒ 8000

d) Round to thousandth ⇒ 8125.376

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The expression 3P2 represents the number of ways of:?

Vsevolod [243]

The expression 3P2 can also be read as "permutation of 3 taken 2". This represents the number of ways in which the 3 items are arranged with the emphasis on the arrangement of the first two other items.

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3 years ago

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A boat sails 20 miles wast of the port and then 15 miles south to an island how far is the boat from the port if you measure thr

sweet-ann [11.9K]

Answer:

25 miles

Step-by-step explanation:

Given: A boat sail 20 miles west of the port and then 15 miles south to an island.

Picture attached.

The distance from port to island could be measured in a straight line. It will form a hypotenous.

∴ we can use Pythogorean theorem to find the distance.

$h^{2} = a^{2} +b^{2}$

Where, "a" is adjacent= 20 miles and "b" is opposite= 15 miles.

$h^{2} = 20^{2} +15^{2}$

⇒ $h^{2} = 400+225= 625$

⇒ $h^{2} = 625$

⇒ $h= \sqrt{625}= \sqrt{25^{2} }$

We know $\sqrt{x^{2} } = x$ .

∴ $h= 25\ miles$

∴ Distance of Port from the Island is 25 miles.

6 0

3 years ago

A collection of nickels and dimes is worth $9.45. If the number of dimes is doubled, the value is

eduard

Answer:

The number of nickels is 45 and the number of dimes is 72.

Step-by-step explanation:

Let

x ----> number of nickels

y ----> number of dimes

Remember that

$1\ nickel=\$0.05$

$1\ dime=\$0.10$

$0.05x+0.10y=9.45$ ------> equation A

$0.05x+0.10(2y)=16.65$

$0.05x+0.20y=16.65$ ------> equation B

<em>Solve the system by substitution</em>

we have

$0.05x+0.10y=9.45$ ------> equation A

$0.05x+0.20y=16.65$ ------> equation B

Multiply both equations by 100 both sides

$5x+10y=945$ ----> $5x=945-10y$ --> equation C

$5x+20y=1,665$ ----> equation D

substitute equation C in equation D

$(945-10y)+20y=1,665$

solve for y

$945+10y=1,665$

$10y=1,665-945$

$10y=720$

$y=72\ dimes$

Find the value of x

$5x=945-10y$

$5x=945-10(72)$

$5x=225$

$x=45\ nickels$

<em>Alternative Method</em>

Solve the system by graphing

Remember that the solution is the intersection point both graphs

using a graphing tool

the solution is the point (45,72)

therefore

The number of nickels is 45 and the number of dimes is 72.

7 0

3 years ago

Which integer represents 100 feet below sea level

Lena [83]

-100 feet ( below means negative )

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3 years ago

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Does the following table show a proportional relationship between the variables x and y? x 5/6 25/6 125/6 y 2 10 50

ki77a [65]

Answer: A:Yes

Step-by-step explanation:

This table shows a proportional relationship between the variables x and y.

3 0

3 years ago

Help please asap!! no links please ​

Help please asap!! no links please