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Airida [17]
2 years ago
6

Which of the following is equivalent to: −−(2+5)−(3−7)?

Mathematics
1 answer:
Umnica [9.8K]2 years ago
3 0

Answer:

You haven't provided expressions, so I can work out the problem for you. When we divide fractions, remember always "keep, switch, flip!" That's what we're gonna do here. We keep the 2/5, switch the sign to multiplication, and flip the 7/8 to 8/7. Therefore, we have 2/5*8/7. That gives us 16/35. Hope this helps!

Step-by-step explanation:

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In triangle ABC, AC=13, BC=84, and AB=85. Find the measure of angle C
r-ruslan [8.4K]

Answer:

90°

Step-by-step explanation:

Angle C = arccos((84²+13²-85²)/(2×84×13))

= arccos(0/2184)

= arccos(0)

= 90°

Answered by GAUTHMATH

3 0
3 years ago
A certain shampoo is available in two sizes. A 12.6-ounce bottle costs $2.37. A 25.3-ounce bottle costs $5.24.
neonofarm [45]

Answer:

The 12.6 oz bottle

Step-by-step explanation:

0.19/oz for the 12.6 oz

0.21/oz for the 25.3 oz

4 0
3 years ago
Find the vertex of the parabola<br> y= x^2-2x-1<br> vertex (?,?)
SpyIntel [72]
y=ax^2+bx+c\\\\vertex:(x_v;\ y_v)\\\\x_v=\frac{-b}{2a}\ and\ y_v=f(x_v)


y=x^2-2x-1\\\\a=1;\ b=-2;\ c=-1\\\\x_v=\frac{-(-2)}{2\cdot1}=\frac{2}{2}=1\\\\y_v=1^2-2\cdot1-1=1-2-1=-2\\\\Answer:(1;-2)
5 0
3 years ago
Read 2 more answers
If there are 600 marbles in a jar, and 22% of them are red, how many are red
Blizzard [7]

Answer:

132

Step-by-step explanation:

5 0
3 years ago
How do I solve N(1/5) = 2/15
dem82 [27]
N(1/5) = (2/15)
divide both sides by (1/5)
n = (2/15)/(1/5)
to divide fractions, cross multiply, e.g. (2*5)/(15*1) = 10/15
n = 10/15 = 2/3 or 0.666666.
8 0
3 years ago
Read 2 more answers
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