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Oksana_A [137]
3 years ago
11

Alg 2 please add explanation

Mathematics
2 answers:
atroni [7]3 years ago
7 0

Answer:

Choice A

Step-by-step explanation:

I would recommend starting off by using the distributive property.

(7x + 5)(2x³ - 4x² + 9x - 3) = 7x(2x³ - 4x² + 9x - 3) + 5(2x³ - 4x² + 9x - 3)

then simplify

  = (14x^4 - 28x³ + 63x² - 21x) + (10x³ - 20x² + 45x - 15)

Now add it all together

  = 14x^4 - 18x³ + 43x² + 24x - 15

The answer is choice A

irina [24]3 years ago
5 0

Answer:

The answer is B

Step-by-step explanation:

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At 700 k, the rate constant for this reaction is 6.2 × 10–4 min–1. how many minutes are required for 10.0% of a sample of cyclop
Anna35 [415]

Answer:

170 min

Step-by-step explanation:

We know that there is a kinetics of the first order, which has the following equation:

ln ([A] t / [A] o) = -k * t

Solving for t:

t = - ln ([A] t / [A] o) / k

How we want to know is the time required with 10%, so [A] t / [A] o = 100% - 10%, that is, 90% = 0.9. We also know that k = 6.2 * (10 ^ -4)

Knowing this, we replace:

t = - ln (0.90) /6.2 * (10 ^ -4)

t = 170 min

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3 years ago
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Answer:

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Step-by-step explanation:

First off you should know 2 represents x and -6 represents y since it is (x,y). To graph this we must find positive 2 on the x line which in the horizontal line. Then we must point -6. Since this term is negative, we move 6 points down since down is negative and up is positive.

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Can someone tell me what’s going on here
lora16 [44]

Answer:

c = 105 degres

Step-by-step explanation:

When two lines cross like that and form an x, the opposite sides are equal (so the angle below the 75 degree one is also 75 degees). Using this, you can figure out the rest.

If both the top an bottom are equal, you know that 150 degres are taken (75+75) and you know that there can only be 360 degres in total here, so you subtract 150 from 360 and get 210. Now you know that the last two sides together are 210, and since they are equal, you divide it by two to get 105 degrees.

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Can someone pls. help me with this, the instruction says "Find the Unknown length marked on the following figure. Round all the
coldgirl [10]

Answer:

The length of diagonal d is 14.1421 cm

Step-by-step explanation:

We are given square

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We need to find the length of diagonal d

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Diagonal\: of\: square=s\sqrt{2}

where s is length of side of square.

Putting values of s and finding length of diagonal of square

Diagonal\: of\: square=s\sqrt{2}\\Diagonal\: of\: square=10\sqrt{2}\\Diagonal\: of\: square=10(1.41421)\\Diagonal\: of\: square=14.1421\:cm

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