Answer:
x=2 and y= -3
Step-by-step explanation:
This is a simultaneous equation. To solve this type of equation, there are three methods; substitution, Elimination and Graphical.
But here, we would be using the substitution method.
3x-y=9 Equation 1
2x-y=7. Equation 2
Getting y from equation 2, we have
-y= 7-2x
Multiply both sides by -
y= 2x-7 Equation 3
Substituting y for 2x-7 in equation 1, we have
3x- (2x-7)=9
3x-2x+7=9
x+7=9
x=9-7
x=2
Substituting x as 2 in equation 3
y=2x-7
y= 2(2)-7
y= 4-7
y= -3
 
        
                    
             
        
        
        
The answer is D) 5 and 5/8ths because 2 1/2 + 3 3/4 + 4 1/8 
= 10 3/8 
10 3/8 + 5 5/8 = 16
        
             
        
        
        
On this app, you can answer other people’s questions and even ask your own. You need points to ask your own though. To get points, you need to answer more questions. Each question varies on points depending on what the person has set the amount of points to be given to the person who answers. Hope this helps!!
        
                    
             
        
        
        
Answer:
C) 2 × 3 × 5
Step-by-step explanation:
Volume of a cuboid = lbh = 30 cm³
A) 1 × 1 × 5 = 5 cm³ ≠ 30 cm³
B) 5 × 10 × 15 = 750 cm³ ≠ 30 cm³
C) 2 × 3 × 5 = 30 cm³ ✔
D) 1 × 2.5 × 4 = 10 cm³ ≠ 30 cm³
=》The correct option is C) 2 × 3 × 5 as it makes 30 cm³, which is the required volume.
Hope it helps ⚜ 
 
        
                    
             
        
        
        
Answer:
(3, -3)
Step-by-step explanation:
If a point is dilated about the origin rule to be followed,
(x, y) → (kx, ky)
where k is a scale factor by which the point is being dilated.
If a point R having coordinates (1, -1) is dilated by scale factor of 3, coordinates of the image will be [3×1, 3(-1)]
Therefore, coordinates of the image R' will be (3, -3)