3 years ago

Please help I don't understand

Mathematics

1 answer:

natali 33 [55]3 years ago

4 0

Answer:

i think it is d y=4x2 + 9x +5

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Evaluate the expression b2- 15 if b=9

Rudiy27

Answer:

Step-by-step explanation:

just plug in 9 to b

9x2=18 18-15=3

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3 years ago

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The expression (1/50)(sqrt(1/50)+sqrt(2/50)+sqrt(3/50)+...+sqrt(50/50) is a Riemann Sum approximation for

alexira [117]

$\dfrac1{50}\left(\sqrt{\dfrac1{50}}+\sqrt{\dfrac2{50}}+\cdots+\sqrt{\dfrac{50}{50}}\right)=\displaystyle\sum_{n=1}^{50}\sqrt{\dfrac n{50}}\frac1{50}$

describes a sum of the areas of 50 rectangles, each of width $\dfrac1{50}$ , and the $n$ th rectangle has height $\sqrt{\dfrac n{50}}$ .

$\sqrt{\dfrac n{50}}$ ranges from a small positive number to 1, which means the integration interval must be $[0,1]$ . The sum is then the right-endpoint Riemann sum of $\sqrt x$ over the interval with $50$ equally spaced subintervals, so

$\displaystyle\sum_{n=1}^{50}\sqrt{\dfrac n{50}}\frac1{50}\approx\int_0^1\sqrt x\,\mathrm dx$

The sum itself evaluates to roughly 0.676, while the exact value of the integral is $\dfrac23\approx0.667$ .

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3 years ago

Use the distributive property to write each of the following expressions as the sum of monomials.

Lostsunrise [7]

Answer:

3a^2+12a

Step-by-step explanation:

3a(4+a)

3a*4=12a

3a*a= 3a^2

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3 years ago

Help with both plz I’ll mark brainliest

LekaFEV [45]

Answer:

(1,6) is not a solution and I think the second one is: c I think

Step-by-step explanation:

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3 years ago

5. Express log2 6 + log2 7 as a single logarithm.

denis-greek [22]

When making two logarithms one logarithm you keep the base (in this case that would be 2) and multiply the two numbers (in this case 7 times 6 = 42) so the answer is

log(2) 42

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3 years ago