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2 years ago

14

4x+4y=15. missing coordinate in the ordered pair (−5,?)

1 answer:

Black_prince [1.1K]2 years ago

6 0

I domt get what you mean by coordinate pair could you explain plseas

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The earth exerts a gravitational force of F(f)=(2.99x10^16)/r^2 newtons on an object with a mass of 75kg located r meters from t

QveST [7]

Umm this should be in physics but F is proportional to 1/r^2 I am assuming you want to just take the derivative in respect to r of both sides of the equation

F = (2.99x10^16)/r^2
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is this for calc class?

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3 years ago

kyle models a sum of two integers. he uses more negative (red) counters than postive (yellow) counters. what do you predict abou

Firdavs [7]

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3 years ago

Can someone help???

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The formula for that is V= $\frac{lwh}{3}$
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2 years ago

Read 2 more answers

PLEASE HELP I'M DESPERATE!

Anettt [7]

The upper comment is correct

4 0

3 years ago

#9 and #10<br> Please show work

Tatiana [17]

Answer:

Part 9) The number of items on Emily's grocery list is 5 and the number of items on Bobby's grocery list is 13

Part 10) The height of the taller bookshelf is 4 feet and the height of the shorter bookshelf is 1 foot

Step-by-step explanation:

Part 9)

Let

x ----> number of items on Emily's grocery list

x ----> number of items on Bobby's grocery list

we know that

$y=2x+3$ ----> equation A

$x=y-8$ ----> equation B

Solve by substitution

Substitute equation A in equation B

$x=(2x+3)-8$

solve for x

$x=2x-5$

$2x-x=5$

$x=5$

Find the value of y

$y=2(5)+3=13$

therefore

The number of items on Emily's grocery list is 5 and the number of items on Bobby's grocery list is 13

Part 10)

Let

x ----> the height of the taller bookshelf in feet

y ----> the height of the shorter bookshelf in feet

we have

$x=5y-1$ ----> equation A

Remember that

$1\ ft=12\ in$

To convert inches to feet divide by 12

so

$60\ in=60/12=5\ ft$

$x+y=5$ ----> equation B

Solve the system by substitution

substitute equation A in equation B

$(5y-1)+y=5$

solve for y

$5y+y=5+1$

$6y=6$

$y=1\ ft$

Find the value of x

$x=5(1)-1=4\ ft$

therefore

The height of the taller bookshelf is 4 feet and the height of the shorter bookshelf is 1 foot

3 0

2 years ago