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STatiana [176]
2 years ago
14

the scoop of an excavator holds 26 ft³of sand. if the capacity of a freight car is 39 tons of sand and we know that 1 ft³ of san

d weighs 0.05 ton how many freight cars can be filled with 120 scoops?
Mathematics
2 answers:
Natasha2012 [34]2 years ago
5 0

Answer:

4!

Step-by-step explanation:

its 0.05 not 0.5! instead of it being 40, its 4

mylen [45]2 years ago
3 0
The answers 40 because 26/x=1/0.5
26/x=1/0.5 simplified US equal to x=13
13 times 120=1560
1560 divided by 39 equals 40
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The regular price of a price of shoes is $60 They are on sale for 20% off.What is the sale price?​
prohojiy [21]

Answer:

48 dollars

Step-by-step explanation:

100%-20%=80%

80%=.8

.8*60=48

7 0
3 years ago
Pls help me with this work sheet i will give brainliest and 50 points
Elden [556K]

1) y = 5

2) y = 34

3) y = -13

idek the rest :(

4 0
3 years ago
How do I get this answer?
Keith_Richards [23]

Answer:

Step-by-step explanation:

Several trig identities are involved in the proof of this. This is the order in which they are used.

  • cos(2x) = cos²(x) -sin²(x)
  • cos²(x) +sin²(x) = 1
  • cos(x) = 1/sec(x)

<h3>Proof</h3>

Starting with the left side, we can transform it into the right side.

  2\cos(2x)=2(\cos^2(x)-\sin^2(x)) = 2(\cos^2(x)-(1-\cos^2(x)))\\\\=2(2\cos^2(x)-1)=2\left(\dfrac{2}{\sec^2(x)}-\dfrac{\sec^2(x)}{\sec^2(x)}\right)\\\\=\boxed{\dfrac{4-2\sec^2(x)}{\sec^2(x)}}

4 0
2 years ago
A person noted that the angle of elevation to the top of a tree was 65 degrees at a distance of 11 feet from the tree. Using the
sashaice [31]

Answer:

approximate 23.590 feet

Step-by-step explanation:

tan 65° = x / 11 = 2.145

x = 11 x 2.145 = 23.595

5 0
3 years ago
Read 2 more answers
1. Explain why n root a^n= |a| when n is even, but not when n is odd.
kogti [31]

Step-by-step explanation:

In the expression a^n, for integer values of n greater than 1, there are n factors. For example, a^2 = a * 2 (2 factors), a^3 = a * a * a (3 factors), etc.

For a non-negative value of a, a^n is non-negative for all values of n.

If a is negative, and n is even, then a^n is non-negative.

If a is negative, and n is odd, then a^n is negative.

|a| is non-negative for all values of a.

sqrt_n(a^n) is negative for negative a and odd n, but |a| is always non-negative, so sqrtn(a^n) cannot equal |a| for odd n.

8 0
3 years ago
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