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ankoles [38]
3 years ago
5

Find 90% of $800 [1]

Mathematics
2 answers:
tino4ka555 [31]3 years ago
8 0

Answer:

90% of $800 would be $720

laiz [17]3 years ago
3 0

Answer:

$720.00

Step-by-step explanation:

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9x+3y+12y-0.9x=9x+(-0.9x)+3y+12y The equation is Commutative Property.. How did they get that second equation?
kozerog [31]
Oh how I miss the days when math was as simple as 2+2=4. 

Educated guess here: By putting parentheses. 
3 0
3 years ago
Suppose that the function f is defined. , for all real numbers, as follows.
aivan3 [116]

Answer:   <em>The values of......</em>

<em>f(-5)=\frac{9}{4}\\ \\ f(-2)= -1\\ \\ f(4)=0</em>

Step-by-step explanation:

Given function is:   \left \{ {{f(x)= \frac{1}{4}x^2 -4, if x\neq -2} \atop {=-1, if x=-2}} \right.

For f(-5),  the value of x is -5, which is not equal to -2.

So,  f(-5)= \frac{1}{4}(-5)^2 -4 = \frac{1}{4}(25)-4 =\frac{25}{4}-4=\frac{25-16}{4}=\frac{9}{4}

For f(-2),  the value of x is -2.

So,  f(-2)= -1

For f(4),  the value of x is 4, which is not equal to -2.

So,  f(4)=\frac{1}{4}(4)^2 -4 =\frac{1}{4}(16)-4 =4-4=0

5 0
4 years ago
Need answer ASAP giving points
dalvyx [7]

Answer:

-  \frac{11}{12}

Step-by-step explanation:

\frac{ \frac{5}{8}  +  \frac{3}{4} }{ \frac{ - 2}{3} -  \frac{5}{6}  }  =  \frac{ \frac{5}{8}  +  \frac{6}{8} }{ \frac{ - 4}{6}  -  \frac{5}{6} }  \\  \\  =  \frac{ \frac{5 + 6}{8} }{ \frac{ - 4 - 5}{6} }  \\  \\  =  \frac{ \frac{11}{8} }{ -  \frac{9}{6} }  \\  \\  =  \frac{11}{8}  \div ( -  \frac{9}{6} ) \\  \\  =  \frac{11}{8}  \times ( -  \frac{6}{9} ) \\  \\  =  \frac{11}{8}  \times ( -  \frac{2}{3} ) \\  \\  =  \frac{11}{4}  \times ( -  \frac{1}{3} ) \\  \\  =  -  \frac{11}{12}

8 0
3 years ago
Help pls i need this done asap ty
zhuklara [117]

Answer:

b) 7.89*10^4

c) 3.15*10^3

Step-by-step explanation:

2-42)

the coefficient in scientific notation (the number that is not 10^x) has to be greater or equal to 1 and less than 10. so c and b are incorrect.

b) 0.789*10^5

c) 31.5*10^2

b) 0.789*10^5

in order to make 0.789 greater than 1, I would just multiply it by 10. shown below

=0.789*10*10*10*10*10

=7.89*10*10*10*10

=7.89*10^4

c) 31.5*10^2

same concept but this time divide by 10 to make 3.15 which will add another *10 to the exponent

=31.5*10*10

=3.15*10*10*10

=3.15*10^3

6 0
3 years ago
Read 2 more answers
Sofia is making a copy of a ticket from the school play to put in her memory album. the original ticket is 7 inches long and 5 i
kotykmax [81]

Answer:

The scale of the copy of the ticket is \frac{2}{7}

Step-by-step explanation:

we know that

To find the scale divide the long of the copy of a ticket by the long of the original of a ticket

so

\frac{2}{7}

7 0
3 years ago
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