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Bess [88]
3 years ago
14

Alex completed 40% of a 50 question assignment how many questions did she complete

Mathematics
2 answers:
mestny [16]3 years ago
8 0
0.4×50=20, good luck!
Liula [17]3 years ago
5 0
20 questions completed
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What is the equation of the line with a slope of 1/2 that passes through the point (-8, -2)?
Luba_88 [7]

Answer:

The answer is

y =  \frac{1}{2} x + 2 \\

Step-by-step explanation:

To find an equation of a line when given the slope and a point we use the formula

y -  y_1 = m(x -  x_1)

From the question we have

y + 2 =  \frac{1}{2} (x + 8) \\ y + 2 =  \frac{1}{2} x + 4 \\ y =  \frac{1}{2} x + 4 - 2

We have the final answer as

y =  \frac{1}{2} x + 2 \\

Hope this helps you

6 0
3 years ago
Show all work to factor x^4 − 17x^2 + 16 completely.
Dmitrij [34]

Answer:

x^{4}-17x^{2} +16 = (x -1)(x + 1)(x - 4)(x + 4)

Step-by-step explanation:

At first, let us find the first two factors of x^{4}-17x^{2} +16

∵ The sign of the last term is positive

∴ The middle signs of the two factors are the same

∵ The sign of the middle term is negative

∴ The middle signs of the two factors are negative

∵ x^{4} = x² × x² ⇒ first terms of the two factors

∵ 16 = -1 × -16 ⇒ second terms of the two factors

∵ x²(-1) + x²(-16) = -x² + -16x² = -17x² ⇒ the value of the middle term

∴ (x² - 1) and (x² - 16) are the factors of x^{4}-17x^{2} +16

Now let us factorize each factor

→ The factors of the binomial a² - b² (difference of two squares) are

   (a - b) and (a + b)

∵ x² - 1 is the difference of two squares

∴ Its factors are (x - 1) and (x + 1)

∵ x² - 16 is the difference of two squares

∴ Its factors are (x - 4) and (x + 4)

∵ (x -1), (x + 1), (x - 4), and (x + 4) are the factors of (x² - 1) and (x² - 16)

∵ (x² - 1) and (x² - 16) are the factors of x^{4}-17x^{2} +16

∴ (x -1), (x + 1), (x - 4), and (x + 4) are the factors of x^{4}-17x^{2} +16

∴  x^{4}-17x^{2} +16 = (x -1)(x + 1)(x - 4)(x + 4)

8 0
3 years ago
Alvaro is interested in the relationship between weather conditions and whether the downtown train runs on time. For a year, he
sladkih [1.3K]

Answer:

I got B :)))

Step-by-step explanation:

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Show how to make a ten to find 12-4. Write the number sentence
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Subtract 2 from 12. 12-2 is 10. You can subtract 10 with 4, and then add 2. (10-4)+2=8.
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Jeremy is digging a hole. The bottom of the hole is – 2.8 ft from the top of the
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