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professor190 [17]
3 years ago
10

Are these parallel, perpendicular,or neither y=-3x+7 -2x+6y=3

Mathematics
2 answers:
vitfil [10]3 years ago
8 0
Whether lines are parallel, perpendicular, or neither depends on their slopes, so let’s get them both into y=mx +b form
The first one already is in that form, and the Slope is -3
Now we just need to get the other one in that form
-2x+6y=3
ADD 2x to both sides
6y=2x+3
DIVIDE both sides by 6
Y=(2/6)x +1/2
2/6 = 1/3
The Slope for the second line is 1/3
The slopes 1/3 and -3 are perpendicular, since 1/3 inverted and made negative equals -3
murzikaleks [220]3 years ago
6 0
They are perpendicular lines because they cross each other and make a 90 degree angle
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In an ice cream shop there is some money in a drawer. After 6 ice creams were sold, there were 70 euros left in the drawer. Afte
Verizon [17]

Answer: There were 40 euros in the drawer at the beginning.

Step-by-step explanation:

When we subtract 6 from 16, we get 10 more ice-creams were sold.

Similarly, we subtract 70 from 120, we get 50 euros was the total selling price of 10 ice-creams.

i.e. Selling price of 1 ice-cream = (50)÷10 =5 euros

Selling price of 6 ice-creams = 6 x 5 = 30 euros

Money in the drawer at the beginning = 70-30 = 40 euros

Hence, there were 40 euros in the drawer at the beginning.

7 0
3 years ago
Lance is buying 2 pairs of pants that cost $15.25 each. There is a 8.5% sales tax.
loris [4]

Answer:

$33.09

Step-by-step explanation:

hope this helps :)

4 0
3 years ago
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77julia77 [94]

D, while numbers is the answer

5 0
3 years ago
What are the intercepts of the equation <br><br> -2A+2y = -8
r-ruslan [8.4K]
X intercepts: (8,0)
y intercepts: (0,-4)
7 0
3 years ago
Which shows a perfect square trinomial?
anastassius [24]
The answer is <span>c. 16x2 + 24xy + 9y2.

Since we need trinomial (three term expression) choices a and b are incorrect because they have only two terms.

So, our square trinomial is a</span>² + 2ab + b² or a² - 2ab + b²
a² + 2ab + b² = (a + b)²
a² - 2ab + b² = (a - b)²

Let's check choices c and d:
c) 16x² + 24xy + 9y²
a² = 16x²
a² = (4x)²
a = 4x

b² = 9y²
b² = (3y)²
b = 3y

a² + 2ab + b² = (4x)² + 2 * 4x * 3y + (3y)² = 16x² + 24xy + 9y²
CORRECT

d) 49x² - 70xy + 10y²
a² = 49x²
a² = (7x)²
a = 7x

b² = 10y²
b² = (y√10)²
b = y√10

a² + 2ab + b² = (7x)² + 2 * 7x * y√10 + (y√10)² = 49x² + 14xy√10 + 10y²
INCORRECT

So, c) is correct answer
8 0
4 years ago
Read 2 more answers
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