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Artist 52 [7]
3 years ago
14

Estimate 28x74 estimate by rounding each number to the nearest ten

Mathematics
1 answer:
Anna71 [15]3 years ago
6 0
28 x 74 =
30 x 70 =
2,100
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Solve the system of equations.<br> y= 3x +5<br> y= 8x +3
Lady bird [3.3K]

Answer:

y=6.2 and x=0.4 or (0.4,6.2)

Step-by-step explanation:

Since both expressions are equal to y, we can set them equal to each other and solve for x:

3x+5=8x+3

5=5x+3

2=5x

2/5=x

0.4=x

Now to solve y:

y=8(2/5)+3

y=16/5+3

y=3.2+3

y=6.2

Check answers:

6.2=3(0.4)+5

6.2=1.2+5

6.2=6.2

6.2=8(0.4)+3

6.2=3.2+3

6.2=6.2

Answers work, so y=6.2 and x=0.4 or (0.4,6.2) as an ordered pair

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3 years ago
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A table saw is on clearance for 20% off. If the sale price of the table saw is $380, what was the original price? Justify your s
Nikolay [14]

20% off means it is selling for 80% of the original price ( 100% - 20% =80%)

Divide the sale price by 80% as a decimal:

380/0.80 = 475

The original price was $475

Justify:

Multiply the original price by 20% and subtract:

475 x 0.20 = 95

475-95 = $380 which is the sale price.

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marshall27 [118]

Answer:8

Step-by-step explanation:

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3 years ago
I’m so confused on how to do this
dimaraw [331]

Answer:

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Step-by-step explanation:

First:  Recognize that (f o g)(x) is the "composition" of two functions, where g(x) serves as the input to f(x).  We are given f(x) = 2x+3 and g(x) = x+5.  You could find g(3) right now:  it is g(3) = 3+5 = 8.  Use this 8 as the input to f(x):  f(8) = 2(8)+3 = 19.

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Please determine the conjugate of 9 - 3i ?
Kazeer [188]

Step-by-step explanation:

You find the complex conjugate simply by changing the sign of the imaginary part of the complex number.

the answer is

9+3i

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1 year ago
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