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guapka [62]
3 years ago
7

If y=4x + 3 find the value of y when x= -2

Mathematics
2 answers:
Jet001 [13]3 years ago
4 0
The correct answer is -5, cause you plug-in -2 * 4 which equals -8 and that +3 = -5
Oliga [24]3 years ago
3 0
Y=4(-2)+3
y= -8+3
y= -5
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Step-by-step explanation:

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mathematically, we have the selling price as;

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4 0
3 years ago
Solve -24.8 + a = 49.67.
AleksandrR [38]

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7 0
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Answer:

Step-by-step explanation:

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63ltr=

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{63 x 259.6}/22 = 16354.8/22 = 743.4 km

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2. To travel a distance of 2013.2 km

we would need to calculate the amount of fuel

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cross multiply

(2013.2 x 22)/259.6

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A car requires 22 litres of petrol to travel a distance of 259.6 km, it would require 170.6 ltr of petrol to travel 2013.2km

if 1ltr is $1.99

170.6 ltr is (170.6 x 1.99)/1 = $339.494≈$339.5

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5 0
2 years ago
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artcher [175]
The height of a tree is 10
10
meters long and it grows 1
1
cm in a year.
Then its height after one year = 10
10
meters 1
1
cm
Its height after 3
3
years = 10
10
meters 3
3
cm
Its height after 6
6
years = 10
10
meters 6
6
cm
Its height after x
x
years = 10
10
meters x
x
cm

Where x
x
represents an unknown number. From the last line, we can find height of the tree after a certain number of years by taking x
x
equal to that number. For example, we simply let x=15
x
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, 25
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. Thus, the value of x
x
depends on our choice. We can give x
x
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x
is not fixed, it varies from one situation to the other. Therefore, we call x
x
a variable whereas 10
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is a fixed number whole value does not change. So 10
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therefore is called a constant.



Read more: http://www.emathzone.com/tutorials/basic-algebra/algebraic-expression.html#ixzz4fDkFcbpZ
3 0
3 years ago
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Aleks04 [339]
Area=width*height
area=(11.7)*(15.4)
area=180.18cm^2
7 0
2 years ago
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