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ehidna [41]
3 years ago
13

Evaluate the algebraic expression 1.5t-7.2 for each given value.

Mathematics
2 answers:
svet-max [94.6K]3 years ago
8 0

Answer:

1.8 and -14.7

Step-by-step explanation:

Given the algebraic expression 1.5t-7.2, to get the value of the expression when t = 6, we will substitute the value of t in the given equation to have;

1.5(6)-7

= 9.0-7.2

= 1.8

Similarly when t = -5, the expression 1.5t-7.2 gives;

1.5(-5)-7.2

= -7.5-7.2

= -14.7

Therefore the expression of the equation at x = 6 is 1.5(6)-7.2 gives 1.8 will at x=-5 gives 1.5(-5)-7.2 which gives -14.7

erastovalidia [21]3 years ago
6 0

Answer:

1.8 and -14.7

Step-by-step explanation:

its just to substitute it as t and simplify

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8 Darpan runs a distance of 12 km and then cycles a distance of 26 km. His running speed is x km/h and his cycling speed is 10 k
Sonja [21]

The equation in terms of x, for the total time he takes in hours would be 2.48 = 12/x  + 26/10x

<h3>What is speed?</h3>

Speed can be calculated as the ratio of distance traveled to the time taken

Darpan runs a distance of 12 km and then cycles a distance of 26 km.

Total distance = 12 + 26 = 38km

The running speed is x km/h

A = x

The cycling speed is 10 km/h faster than his running speed

B = 10x

He takes a total time of 2 hours and 48 minutes.

So, the total time he takes

Time = Distance x speed

2.48 = 12/x  + 26/10x

10x(2.48) = 120 + 26

24.8x = 146

x = 5.8

Learn more about speed here;

brainly.com/question/7359669

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8 0
2 years ago
-2b-6+3b-2 simplified
Natalka [10]

Answer:

Step-by-step explanation: b - 8

4 0
4 years ago
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A) Work out the value of 213 + (29)2
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a) 2^13 / 2^18

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6 0
3 years ago
larry earned $11 walking his neighbors' dogs on saturday. he earned some extra money on sunday doing the same thing. write an ex
jok3333 [9.3K]
This is easy. He first earned $11 on Saturday and then on Sunday he earned some money. We don't know how much he earned, we just know he earned some money. Let's put the expression together. A good place to start would be the $11. Let's add eleven to the expression. And because he earned some more money, it's going to be addition. So currently, the expression stands at $11 + 
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3 years ago
Apply the distributive property to create an equivalent expression.
ira [324]

Answer:

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Step-by-step explanation:

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Multiply the 2 by each term inside the parentheses

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