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Taya2010 [7]
3 years ago
13

Factor x2-3x - 28

Mathematics
1 answer:
AVprozaik [17]3 years ago
5 0

Answer:

x equal to -4 or 7

Step-by-step explanation:

x square - 3 x - 28 equals 0 so for me are you now find factors of 28 that and you add you add or multiply those two factors to get those two factors to give you 28 so now so you know Factor ways to get (open x + 4) Close x (open x - 7) close equal to zero your ex number comes -4 or 7

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The sum of the first and third consecutive add integers is 131 less than 3 times the second integer.Find the 3 integers.Pls writ
Arisa [49]
3 consecutive odd integers....x, x + 2, and x + 4

x + x + 4 = 3(x + 2) - 131
2x + 4 = 3x + 6 - 131
2x + 4 = 3x - 125
2x - 3x = - 125 - 4
-x = - 129
x = 129

x + 2 = 129 + 2 = 131
x + 4 = 129 + 4 = 133

so ur 3 odd numbers are : 129,131, and 133 <==
6 0
3 years ago
How many millimeters are in 170 centimeters
Vladimir [108]

There are 10millimeters in one centimeter.

Since centimeter is a bigger measurement you'd multiply.

170 * 10 = 1700

There are 1700 millimeters in 170cm

Answer

1700 millimeters

3 0
3 years ago
What is the answer to this problem 1/2=q 2/3?
Angelina_Jolie [31]
3/2 = 2q
q = 3/2 ÷ 2
q = 3/2 × 1/2
q = 3/4
6 0
3 years ago
Work out the total surface area of this hemisphere which has a radius of 8cm.
Masja [62]

\bf \textit{surface area of a sphere}\\\\ SA=4\pi r^2~~ \begin{cases} r=radius\\ \cline{1-1} r=8 \end{cases}\implies SA=4\pi (8)^2\implies SA=256\pi \\\\\\ \stackrel{\textit{half of that for a \underline{hemi}sphere}}{\cfrac{256\pi }{2}\implies 128\pi \implies }\stackrel{\textit{rounded up}}{402.1}

4 0
3 years ago
Suppose that prices of recently sold homes in one neighborhood have a mean of $215,000 with a standard deviation of $8900. Using
bonufazy [111]

Answer:

The minimum percentage of recently sold homes with prices between $197,200 and $232,800 is 75%.

Step-by-step explanation:

Chebyshev Theorem

The Chebyshev Theorem can also be applied to non-normal distribution. It states that:

At least 75% of the measures are within 2 standard deviations of the mean.

At least 89% of the measures are within 3 standard deviations of the mean.

An in general terms, the percentage of measures within k standard deviations of the mean is given by 100(1 - \frac{1}{k^{2}}).

In this question:

Mean of $215,000, standard deviation of $8900.

What is the minimum percentage of recently sold homes with prices between $197,200 and $232,800?

215000 - 2*8900 = 197200

215000 + 2*8900 = 232800

Within 2 standard deviations of the mean, so:

The minimum percentage of recently sold homes with prices between $197,200 and $232,800 is 75%.

4 0
3 years ago
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