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aleksandr82 [10.1K]
4 years ago
12

What is 6% of 80? Round to the nearest hundredth (if necessary).

Mathematics
1 answer:
RoseWind [281]4 years ago
5 0

Answer:

4.8

Step-by-step explanation:

80 * 0.06 = 4.8

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gtnhenbr [62]
<span>∫(sinx cosx)^2dx = ∫(1/2sin 2x)^2 dx = 1/4∫sin^2 2x dx = 1/4∫1/2(1 - cos 4x)dx = 1/8∫(1 - cos 4x) dx = 1/8[x - sin 4x / 4] + c = 1/32(4x - sin 4x) + c
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8 0
3 years ago
Solve 2x2 + 20x = −38. (1 point)
RoseWind [281]

Answer:

The solutions are x=-5+\sqrt{6}  and x=-5-\sqrt{6}


Step-by-step explanation:

we have

2x^{2} +20x=-38

Divide by 2 both sides

x^{2} +10x=-19 ------> x^{2} +10x+19=0

we know that


The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to


x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}


in this problem we have


x^{2} +10x+19=0

so


a=1\\b=10\\c=19


substitute

x=\frac{-10(+/-)\sqrt{10^{2}-4(1)(19)}}{2(1)}


x=\frac{-10(+/-)\sqrt{100-76}}{2}


x=\frac{-10(+/-)\sqrt{24}}{2}


x=\frac{-10(+/-)2\sqrt{6}}{2}


x1=\frac{-10(+)2\sqrt{6}}{2}=-5+\sqrt{6}


x2=\frac{-10(-)2\sqrt{6}}{2}=-5-\sqrt{6}


8 0
3 years ago
Read 2 more answers
35x-12= -34x+710 answer fast too
Likurg_2 [28]

Answer:

x=722/69

Step-by-step explanation:

8 0
3 years ago
Doctor florens needs 25 g of salt for each student to do an experiment she has 1.2 kg of salt on hand she has a total of a 128 s
erik [133]
The first thing I would do is convert that 1.2 kilograms of salt to grams; that would ensure that all the units are the same so we can perform calculations on them.

1.2kg = 1200g


Next, I would find out how many students can do the experiment with 1200g of salt, by finding it how many 25g are in 1200g (by dividing them).

\frac{1200g}{25g}=48students


That means we still have 80 students left to provide salt for (128 - 48).
Therefore, he needs an additional 80 amounts of 25g of salt.

Therefore he needs:
80students*25g = 2000g = 2kg
5 0
4 years ago
Use the matrix tool to solve the system of equations 5x+2y=1 and -x-y=-2
Aleks [24]

Answer:

Step-by-step explanation:

1.5x+2y=1\\2.-x-y=-2\\2.2(-x-y=-2)\\5x+2y=1\\-2x-2y=-4      +\\3x=3\\x=1\\Substitute               into                    number one\\5+2y=1\\y=-2

6 0
3 years ago
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