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Pachacha [2.7K]
2 years ago
7

kims age is twice of her sister when you add to her sisters age you get 3 how old is each sister (a) write an equation that repr

esents thevsituation explain any varible used (b) solve the equation form part a show your work state your solution as a complete sentence
Mathematics
1 answer:
Lina20 [59]2 years ago
6 0
Kim is 2. Her sister is 1 years old. 2+1=3
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Find the sum.<br><br><br> (2x-6)+(4x-12)<br><br> Please and thank you
Vaselesa [24]

Answer:

6x - 18

Step-by-step explanation:

Haha i finished first

3 0
3 years ago
Read 2 more answers
Write the standard form of the equation of the circle with endpoints of a diameter at the points (7,2) and (-9,5).
lys-0071 [83]

Answer:

(x+1)^2 + (y- 3.5)^2 =64

Step-by-step explanation:

We are given that  endpoints of a diameter at the points (7,2) and (-9,5).

Center of the circle is the mid point of diameter

So, first find the mid point of diameter

Formula : x=\frac{x_1+x_2}{2} , y=\frac{y_1+y_2}{2}

(x_1,y_1)=(7,2)\\(y_1,y_2)=(-9,5)

Substitute the values in formula

x=\frac{7-9}{2} , y=\frac{2+5}{2}

x=-1 , y=3.5

So, center of circle = (h,k )=(-1,3.5)

To find length of diameter :

d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

(x_1,y_1)=(7,2)\\(y_1,y_2)=(-9,5)

d=\sqrt{(-9-7)^2+(5-2)^2}

d=\sqrt{265}

Length of radius = r = \frac{Diameter}{2}=\frac{\sqrt{256}}{2}

Standard form of the equation of the circle : (x -h)^2 + (y- k)^2 = r^2

(h,k )=(-1,3.5)

r=\frac{\sqrt{256}}{2}

Equation of the circle : (x+1)^2 + (y- 3.5)^2 =(\frac{\sqrt{256}}{2})^2

Equation of the circle : (x+1)^2 + (y- 3.5)^2 =64

Hence  the standard form of the equation of the circle with endpoints of a diameter at the points (7,2) and (-9,5) is  (x+1)^2 + (y- 3.5)^2 =64

5 0
3 years ago
Roger had 2kg of rice, he sold 15%.How many grams of rice did he sell
Dmitry [639]

Answer:

300 grams

Step-by-step explanation:

2kg = 2000 grams

15% = 15/100

15/100 × 2000 = 300 grams

PLEASE MARK ME AS BRAINLIEST

6 0
2 years ago
6x+7=13+7x a 6 b -6 c 3 d -3
Softa [21]

Answer:

The answer is B. x= -6

Step-by-step explanation:

hope this helps

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2 years ago
Solve for X, 3^x + 3^2 = 90​
polet [3.4K]

3^x + 3^2 = 90

Simplify the known power:

3^x + 9 = 90

Subtract 9 from both sides:

3^x = 81

Take the cubic root of both sides:

X = 4

8 0
2 years ago
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