Answer:
x = -13 and y = -4
Step-by-step explanation:
-4x + 8y = 20 ................... eqn 1
2x + 2y = -30 ................... eqn 2
Step 1: Multiply eqn 1 by 2 and eqn 2 by 4
(-4x + 8y = 20) × 2
(2x + 2y = -30) × 4
we will have
-8x + 16y = 40 ....................eqn 3
8x + 4y = - 120 .................. eqn 4
Step 2: Add eqn 3 and 4 together
20y = - 80
Step 3: divide all through by 20
y = -80/20
y = -4
Step 4: Substitute -4 for y in eqn 1
-4x + 8(-4) = 20
-4x - 32 = 20
-4x = 20 + 32
-4x = 52
Step 5: Divide both sides by -4
x = 52/-4
x = -13
It’s a million grains. Duhhhhh
Answer:
Step-by-step explanation:as we know that arc length is
s=r*∅
as given angle in degree so convert it in radian we get
angle=2.09 rad
r=3.5 cm
hence we get
s=3.5*2.09 =7.315 cm
perimeter of sector = s +d where d=2*r=2*3.5=7 cm
perimeter of sector=7.315+7=14.315 cm
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Hi 0101sj,
Your Question:
Avril types essays for students from her home. On average, she can type a page in about 10 2/3 minutes. she spends 54 1/2 minutes typing on essay, how many pages if this essay?
Answer:
1 PAGE = 10 2/3 = 10.20
Essay = 54 1/2 = 54.50
54.50 / 10.20 = 5.34313...
She approximately wrote 5 pages.
Answer:
- C. V = 15 x 4.2
- D. V = 7.5 x 2 x 4.2
Step-by-step explanation:
The volume is the product of the three dimensions, so can be figured as ...
7.5 × 2 × 4.2 . . . . choice D
Carrying out the first multiplication, this will be equivalent to ...
15 × 4.2 . . . . . . . . choice C
