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3 years ago

What is the value of the expression 3x-8y when x=10 and y=2?

Mathematics

2 answers:

Greeley [361]3 years ago

7 0

Answer:

Step-by-step explanation:

3x-8y

(3*10)-(8*2)

30-16

madam [21]3 years ago

3 0

Answer:

30-16

Step-by-step explanation:

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PLEASE HELP AND EXPLAIN THIS ALSO GRAPH PLS the answer choices are -6, -4, 6, 4

liubo4ka [24]

$\sf \: (x,y) = ( - 4, - 6)$

$\rule{300pt}{3pt}$

Detailed solution can be found in the attachment!!~

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2 years ago

An iron cube measures 10cmx10cmx10cm. what is its volume?

Andrei [34K]

Volume of a cube is sides a3

so 10x10x10

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2 years ago

monica sells lemonade over the summer and uses conical paper cups to serve the lemonade. Each cup is 8 centimeters tall.She star

GaryK [48]

Answer:

(a)205

(b)5 Packages

Step-by-step explanation:

$\text{One gallon is equivalent to 3785 } cm^3$

Therefore: $\text{10 gallon= 3785X 10 =37850 } cm^3$

Therefore, Volume of the lemonade Monica Started with is $\text{37850 } cm^3$

The diameter of the cup =8cm

Therefore, Radius =8/2 =4cm

Height of the Cup =11cm

Volume of a Cone= $\frac{1}{3}\pi r^2 h$

$\text{Volume of the Cup}=\frac{1}{3}\pi *4^2*11 \\=184.31cm^3$

The number of cups needed to empty the 10 gallon cooler =37850÷184.31

=205.36

$\approx 205$ Cups

(b)If the Cups are sold in packages of 50

Number of Package to be bought =205 ÷ 50 =4.1

She would need to buy 5 packages.

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2 years ago

If f(x) = 12x+2, then f^-1(x) =??

olga nikolaevna [1]

Step-by-step explanation:

Given

f(x) = 12x + 2

f^-1(x) = ?

Now

Let y = f(x)

or y = 12x + 2

Interchanging the role of x and y

x = 12y + 2

x - 2 = 12y

y = x - 2

Therefore f^-1(x) = x - 2

Hope it will help you.

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3 years ago

Read 2 more answers

I need help on .5 and .6

Dovator [93]

5. 44 (forty four)
6. 58

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2 years ago