3x+4y=11
4y=11-3x
Substituting this into x+4y=9
X+11-3x=9
-2x=9-11
-2x=-3
2x=3
X=3/2
Substituting this into x+4y=9
3/2+4y=9
4y=9-3/2
4y=18/2-3/2
4y=15/2
Y=15/2/4
Y=15/8

X=1 1/2
Y=1 7/8

8 0

2 years ago

if a questions asks to find the area of half of the circle would you do 3.14(pie) times r2(radius squared) times 1/2? and if no

Leya [2.2K]

Answer:

$A=\dfrac{3.14r^2}{2}$

Step-by-step explanation:

The area of a circle is given by :

$A=\pi r^2$

Where

r is the radius of the circle.

If we talk about the area of half of the circle, it means we have to half the area such that,

$A=\dfrac{\pi r^2}{2}\\\\or\\\\A=\dfrac{3.14r^2}{2}$

Hence, this is the required solution.

4 0

3 years ago

Please answer the pic below for Brainliest and 5 stars (If correct)

katrin [286]

ANSWER:

C. 17 mm and 53.5 mm

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Step-by-step explanation:

The circumference formula:

C = πd

π ≈ 3, so the circumference is approximately 3 times the diameter.

C/d ≈ 3

Let's verify the options:

A. 72/35 ≈ 2, no

B. 35/8 ≈ 4, no

C. 53.5/17 ≈ 3, yes

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4 0

3 years ago

Two complementary angle are in the ratio of 4:11 find the bigger angle

Xelga [282]

Answer:

bigger angle is 66° ......

6 0

3 years ago