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
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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)
