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GaryK [48]
3 years ago
8

Please help ill give brainliest

Mathematics
1 answer:
dimaraw [331]3 years ago
3 0

Answer:

Step-by-step explanation:

<u>$21.50</u>  |  0.2(10) + 24.2 = <u>$26.20</u>  |  21.50 - 26.20 = <u>$ -4.70</u>

$25.00 |  0.2(12) + 24.2 = <u>$26.60</u>  | 25.00 - 26.60 = <u>$ -1.60</u>

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To the nearest tenth, what is the y-coordinate for point A? 4.5 4.6 4.7 4.8
fomenos
the complete question is
<span>Point A has an x coordinate of −2 and lies in a circle with a center at (0, 0) and a radius of 5.
To the nearest tenth, what is the y-coordinate for point A?
A: 4.5
B: 4.6
C: 4.7
D: 4.8
see the attached figure

we know that
the equation of the circle is
(x-h)</span>²+(y-k)²=r²
(h,k) is the center---------> (h,k) is the point (0,0)
r=5 units
so
(x-h)²+(y-k)²=r²--------> (x-0)²+(y-0)²=5²------> x²+y²=25

substitute the value of x=-2 in the equation
(-2)²+y²=25------> y²=25-4------> y=(+/-)√21
the y coordinate of point A is positive----> see the picture
therefore
y=√21-----> 4.58-----> y=4.6

the answer is
the y-coordinate for point A is 4.6


3 0
3 years ago
Read 2 more answers
30% of which number is 3?
Nutka1998 [239]

Answer:

10

Step-by-step explanation:

30/100*x=3

Multiply both sides by 100 and divide both by 30

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4 0
2 years ago
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Write a quadratic equation with roots of 3/4 and -4
Vaselesa [24]

A quadratic equation given roots is solved by using the relation

{x}^{2}  - (sum \: of \: roots)x + product \: of \: roots

from the question,

sum of the root will be

\frac{3}{4}  + ( - 4) =  \frac{3}{4}  - 4

=   \frac{3 - 16}{4}

=  \frac{ - 13}{4}

and also, product of the roots will

be

\frac{3}{4}  \times ( - 4) =  - 3

now substituting the sum of roots and product of roots into the equation

{x}^{2}  - ( -  \frac{13}{4} )x - 3

=  {x}^{2}  +  \frac{13}{4} x - 3

as the quadratic equation for the root 3/4 and -4

4 0
3 years ago
8x + y = 20<br> x - 2y = -6
OleMash [197]

Answer: the answer is

Step-by-step explanation:

6 0
2 years ago
a cookie recipe calls for 2 1/4 cups of sugar for every 2/3 cups of flour.if you made a batch of cookies using 1 cup of flour ho
GenaCL600 [577]
Figure out how many cups of sugar are in 1/3 cup flour: 9/4÷2= 9/4÷1/2= 1 1/8. Multiply by 3: 1 1/8x3= 9/8x3/1= 27/8= 3 3/8. 3 and 3/8 cup of sugar for 1 cup flour. :)
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3 years ago
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