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3 years ago

Here is a map of a town.

Mathematics

2 answers:

Gennadij [26K]3 years ago

7 0

Answer:

The distance between park and museum is 12km.

Step-by-step explanation:

The ratio of map is 1cm : 4km. So you have to multiply by 4 :

$1cm = 4km \\ 3cm = 4km \times 3 \\ 3cm = 12km$

bezimeni [28]3 years ago

3 0

12km

Step-by-step explanation:

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Evaluate the following expression:

Alja [10]

Answer:the last one I think I really don’t know

Step-by-step explanation:

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3 years ago

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Solving multi step equations 2y + 8 + 4y = 44

rjkz [21]

Answer:

y=6

Step-by-step explanation:

6y+8=44

44-8=6y

6y=36

6y/6 =36/6

y=6

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3 years ago

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What is the simplified expression for 3a^2+9ab+5-4a^2-4ab +3?

seraphim [82]

Answer:

$-4a^2+4ab+8$

Step-by-step explanation:

our expression is

$3a^2+9ab+5-4a^2-4ab+3$

we are asked to simplify the expression

in order to that we first bring the like terms together

like terms are those having the same variable or same combination of variables with exactly same degrees

Hence it would be like

$3a^2-4a^2+9ab-4ab+5+3$

now we simplify the like terms

$3a^2-4a^2=-4a^2$

$9ab-4ab=4ab$

$5+3=8$

Hence

$3a^2-4a^2+9ab-4ab+5+3=-4a^2+4ab+8$

4 0

4 years ago

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2(h - 8) - h = h - 16

tresset_1 [31]

$2(h-8)-h=h-16$

$2h-16-h=h-16$

$h=h$

h has infinitely many solutions.

5 0

3 years ago

During a musical an orchestra is playing. As the music plays, the volume changes in the beginning of the piece can be modeled by

IrinaK [193]

Answer:

The sound level would be at 80 decibels at 1 or 7 number of measures played

Step-by-step explanation:

Equations with Absolute Values

We have the function s to represent the sound level in decibels:

$s = 10|x - 4|+ 50$

Where x is the number of measures of the music played.

We are required to find the value of x that makes s=80 decibels. We have to find the equation:

$10|x - 4|+ 50 =80$

Subtracting 50:

$10|x - 4| =80-50$

$10|x - 4| =30$

Dividing by 10:

$|x - 4| =30/10=3$

$|x - 4| =3$

For the absolute value be equal to 3, its argument could be positive or negative:

$x-4=3$

$x-4=-3$

This leads us to two solutions:

$x=3+4=7$

x=7

$x-4=-3$

$x=4-3=1$

x=1

The sound level would be at 80 decibels at 1 or 7 number of measures played

4 0

4 years ago