Answer:
3x + 7y = −17
4x − 7y = 10
Add up both sides of 2 equations, then
7x = -7
=> x = 1
=> y =(3 x 1 - 17)/7 = -14/7 = -2
Hope this helps!
:)
Answer:
C
Step-by-step explanation:
Because a parameter is regarding a whole population. The other options are samples of a population.
Hence, -45 is the number which when added to the given fraction will give 2/3
Further explanation:
Given fraction is:
![\frac{23}{12}](https://tex.z-dn.net/?f=%5Cfrac%7B23%7D%7B12%7D)
Let x be the number which has to be added to numerator and denominator
Then
![\frac{23+x}{12+x}=\frac{2}{3}](https://tex.z-dn.net/?f=%5Cfrac%7B23%2Bx%7D%7B12%2Bx%7D%3D%5Cfrac%7B2%7D%7B3%7D)
Cross-multiplying
![\frac{23+x}{12+x}=\frac{2}{3} \\3(23+x)=2(12+x)\\69+3x=24+2x\\3x-2x=24-69\\x=-45](https://tex.z-dn.net/?f=%5Cfrac%7B23%2Bx%7D%7B12%2Bx%7D%3D%5Cfrac%7B2%7D%7B3%7D%20%5C%5C3%2823%2Bx%29%3D2%2812%2Bx%29%5C%5C69%2B3x%3D24%2B2x%5C%5C3x-2x%3D24-69%5C%5Cx%3D-45)
Hence, -45 is the number which when added to the given fraction will give 2/3
Keywords: Linear equation in one variable, Cross-multiplication
Learn more about linear equation at:
#LearnwithBrainly
Answer:
Area of the figure = 16 + 12.56 = 28.56 units²
Step-by-step explanation:
The area of the figure below is when you add the area of each recognizable shape that makes up the figure.
From the figure I can recognize 4 squares and quarter of a circle into 4 places.
The radius of the circle is 2 unit while the sides of the square is also 2 units.
Area of the squares
area = L²
area = 2² = 4
area for 4 squares = 4 × 4 = 16 units²
Area of the quarter circles.
area = πr²/4
area = π × 2²/4 = 4π/4 = π
area of the 4 quarter circles = 4π = 4 × 3.14 = 12.56 units²
Area of the figure = 16 + 12.56 = 28.56 units²
No I don’t understand ur questions if u could rephrase them so I could answer