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bixtya [17]
2 years ago
13

As Soon As Possible! (please)

Mathematics
1 answer:
belka [17]2 years ago
6 0
I believe it is C because it I s bigger but not to big of a amount please tell me if I am wrong
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Which expression is equivalent to cos(1.4x) − cos(0.6x)?
givi [52]

Answer:

  A.  -2sin(x)sin(0.4x)

Step-by-step explanation:

At x=0, the given expression evaluates to zero.

For x near zero, the given expression is slightly negative. You know this because cos(1.4x) decreases faster than cos(0.6x), so their difference will be negative.

Of the answer choices, you can eliminate C and D because they are not zero at x=0. You can eliminate choice B, because it is positive for values of x near zero. The only viable choice is A:

   -2sin(x)sin(0.4x)

___

Of course, a graphing calculator can help you figure this out. See the attachment. The given expression is plotted using a solid red line; the answer choice A is plotted using blue dots.

5 0
2 years ago
Read 2 more answers
A family buys 3 dinners at $9 each, 2 kids’ meals at $4 each, and 4 desserts at $3 each. After using a $10 off coupon, how much
Tomtit [17]
Hi

3 dinners at $9 each.
9 x 3

2 kids' meals at $4 each
9 x 3 + 4 x 2

4 desserts at $3 each
9 x 3 + 4 x 2 + 4 x 3

$10 dollar off coupon
9 x 3 + 4 x 2 + 4 x 3 - 10

Solve using PEMDAS
9 x 3 + 4 x 2 + 4 x 3 - 10 = ?
27 + 8 + 12 - 10 = ?
35 + 12 - 10 = ?
47 - 10 = ?
37

The answer is 37

Hope this helps! :)
6 0
3 years ago
Read 2 more answers
Abby Matthew, store manager for Sears, does not know how to price
Nataly_w [17]
$480 since the question is just is how much would the would price be after the discount (discount)
6 0
2 years ago
Working alone at its constant rate, pump X pumped out ¼ of the water in a tank in 2 hours. Then pumps Y and Z started working an
madam [21]

Answer:

The correct option is B) 12.

Step-by-step explanation:

Consider the provided information.

Working alone at its constant rate, pump X pumped out ¼ of the water in a tank in 2 hours.

As we know: rate =\dfrac{ work}{time},

The rate of pump X is \frac{\frac{1}{4}}{2} = \frac{1}{8}

\frac{1}{4} of the water is pumped out of the tank, that means only \frac{3}{4} is left to be pumped out.  

All 3 pumps pumped out the remaining \frac{3}{4} of the water out in 3 hours.

The combined rate of all three pumps is: \frac{\frac{3}{4}}{3} = \frac{1}{4}

Pump Y, working alone at its constant rate, would have taken 18 hours to pump out the rest of the water.

The rate of pump Y = \frac{\frac{3}{4}}{18} = \frac{1}{24}

Let z is the time taken by pump Z, then the rate of pump Z is \frac{1}{z}.

Therefore,

\dfrac{1}{8}+\dfrac{1}{24}+\dfrac{1}{z}=\dfrac{1}{4}

Multiplying both sides by 24 z.

3z + z + 24 = 6z\\24 = 2z\\12 = z

Hence, the correct option is B) 12.

5 0
3 years ago
0.03g IM prn. 10mL multidise vital reads<br> 25mg/mL. how many ML do you give? ​
Maslowich

I uploaded the answer to a file hosting. Here's link:

tinyurl.com/wpazsebu

8 0
3 years ago
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