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Vlad [161]
3 years ago
10

Solution of the equation 3x/5+1 = 4x/15+7

Mathematics
1 answer:
Inessa05 [86]3 years ago
6 0

Answer:

x=18

Step-by-step explanation:

\frac{3x}{5} +1=\frac{4x}{15} +7

\frac{3x}{5} -\frac{4x}{15} =7-1

\frac{9x}{15} -\frac{4x}{15} =6

5x/15=6

5x=90

x=18

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Step-by-step explanation:

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3 0
3 years ago
A sandwich costs 5:70 and a piece of fruit costs 2:15 if you have a 20 bill, how much change will you get ?
Gelneren [198K]
Well if you buy only 1 of each, it would cost you 7.85 in total. if you subtract that from 20, it equals 12.15.
you can also make it a linear equation if you want more or less than 1 fruit and or sandwich
s=sandwich
f=fruit
5.7f+2.15f=20
7 0
3 years ago
What’s the slope of (5,9) and (8,4)
Allushta [10]

Answer: -5/3

Step-by-step explanation:

Use the slope formula: \frac{y_{2}-y_1 }{x_2-x_1}

You substitute the numbers in and subtract to get -5/3.

4 0
3 years ago
Read 2 more answers
The right triangle shown has angles X, Y, and Z and side lengths a, b, and
laiz [17]
So attached is a picture of the triangle you are talking about and listed under are the choices:

A.) Cos Z=b/c 
B.) Sin X=c/b 
C.) Tan X=b/a 
<span>D.) Tan Z=a/b
</span>
The answer would then be B. SinX = c/b.

Just remember SOH CAH TOA:

Sinθ=  Opposite         Cosθ =    Adjacent             Tanθ=   Opposite
         Hypotenuse                   Hypotenuse                        Adjacent

Using the triangle in the scenario, you just need to identify which side is which. 

Given m∠Z
Adjacent = b
Opposite = a
Hypotenuse = c

SinZ=  a         CosZ = b             TanZ= a 
            c                      c                        b

Given m∠X:

Adjacent = b
Opposite = a
Hypotenuse = c

SinX= <u> b </u>        CosX =<span><u> a </u></span>            TanX=<span><u> b </u></span>
            c                      c                        a

So the answer is B. 

Attached is a picture of how I assigned the sides depending on the angle used.

4 0
3 years ago
What is 20% of $45.00?
Gnoma [55]
It is 9$ :)

45*0,2=9

YW
4 0
3 years ago
Read 2 more answers
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