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AysviL [449]
3 years ago
14

How to do these problems

Mathematics
1 answer:
Paul [167]3 years ago
5 0
So all you have to do is divide the fractions. you would write 7/15 in your calculator, and boom you have the answer. or, you can just divide it by pencil and paper, which is harder. 4/5=0.8
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A math teacher gets a starting salary of $30,000. IF she gets a 1.5% increase in salary each year, what will her total income be
kolezko [41]
No it is not base e.  It is 1.015.

An increase of 1.5 % =  1.015 

Year            1,             2,                       3,.........................., 30.
               30000, 3000(1.015),  30000(1.015)²,........... 30000(1.015)²⁹

Her Total Income is sum over the thirty 30 year period:

Sn =  a(r^n  - 1) / (r - 1);                a = 30000,  r = 1.015,  n = 30

Sn =  30000 ( 1.015^30  -  1) / (1.015 - 1)

      =  30000 (1.56308022 - 1) / (0.015) =  1126160.44

Total =  $ 1 126 160.44

5 0
3 years ago
The area of a rectangular carpet is 28 square feet. The length is three feet more then the width. Find the length and the width
Vanyuwa [196]
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8 0
3 years ago
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What does quadratic mean?
RSB [31]
Involving the second and no higher power of an unknown quantity or variable.
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Given Triangle DEF is isosceles and angle D is the vertex angle, Find x, DE, DF, EF
ch4aika [34]

Answer:

x=2;DE,EF=9,DF=5

Step-by-step explanation:

Since DEF is isoceles, you can set the equations

x+7 and 2x+5 equal to each other

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-x=-2,

x=2, now plug in for each side

DE,EF=9

DF=3(2)-1=5

4 0
3 years ago
Which equation is not equivalent to 2x+10=-8
Vlada [557]

Answer:

2x+10=-8

x=9

3x=9

x=3

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x=5

Step-by-step explanation:

4 0
3 years ago
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