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Olenka [21]
3 years ago
7

Rewrite in rectangular form: r=5

Mathematics
1 answer:
SVETLANKA909090 [29]3 years ago
6 0

Answer:

x  ^2+ y^ 2 = 25

Step-by-step explanation:

Square both sides:

r ^2 = 5^ 2

Substitute  x ^2 + y^ 2  for  r ^2 :

x ^2+ y ^2 = 5 ^2

Insert the center -0 into the x and y terms:

( x − 0 )^ 2 + ( y − 0 ) ^2 = 5 ^2

This is the standard form for a circle whose center is  ( 0, 0 )  and the radius is 5.

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A marketing firm claims that its ad campaign will increase sales for a fast-food chain by 15%. In a random sample of 49 stores,
enyata [817]

Answer:

4.20

Step-by-step explanation:

Given data:

the average increase in sales 'x' = 18

ad campaign will increase sales for a fast-food chain 'μ'= 15

standard deviation 'σ'= 5

random sample of stores 'n'=49

In order to determine z-value, we use the formula i.e

z=( x-μ ) / (σ/\sqrt{n} )

z=( 18-15) / (5/\sqrt{49 )

z= 3/ 0.714

z= 4.20

4 0
4 years ago
How do I write 23/50 as a decimal?
masha68 [24]
A fraction is just a short way to write a division problem.

Every fraction really means

                       (the top number) divided by (the bottom number).

When you actually do the division, the quotient is the decimal for the fraction.

To find the decimal for 23/50,  divide 23 by 50 .
7 0
4 years ago
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If 3x + 2y = 5, what is the value of the expression 6x + 4y - 7?
pickupchik [31]

Answer:

3

Step-by-step explanation:

x = 1

y = 1

6+4-7 = 3

6 0
3 years ago
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Please help me asap!!
laila [671]

Answer:

h=6

Step-by-step explanation:

h/8=12/16

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7 0
3 years ago
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NEED HELP ASAP PLEASE!!
Aliun [14]

Answer:

7√8

Step-by-step explanation:

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