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Rus_ich [418]
3 years ago
7

Perform the indicated operation. -8 + (-4)

Mathematics
1 answer:
Lostsunrise [7]3 years ago
3 0

It is -12, negative + negative is Negative unless if its with a positive it will cancel out

ex, -12 + 6= -6

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AB = 6x DC = x + 15 AD = 9 BC = 3y Quadrilateral ABCD is a parallelogram if both pairs of opposite sides are congruent. Show tha
ra1l [238]

Answer:

Therefore the lengths of the opposite side pairs.

C) 18, 9

Step-by-step explanation:

Given:

Quadrilateral ABCD is a parallelogram

AB = 6x

DC = x + 15

AD = 9

BC = 3y

TO Find:

AB = ?

BC = ?

Solution:

Quadrilateral ABCD is a parallelogram ..........Given

∴ Both pairs of opposite sides of a Parallelogram are congruent.

∴ AB = DC   and AD = BC

substituting the values we get

6x=x+15\\6x-x=15\\5x=15\\x=\dfrac{15}{5}\\ x=3\\and\\9=3y\\y=\dfrac{9}{3}\\ y=3

substituting the x' and 'y' values we get

AB= 6\times 3=18\\and\\BC=3\times 3=9

Therefore the lengths of the opposite side pairs.

C) 18, 9

3 0
3 years ago
32. Find the ratio of the side lengths of the small triangle to the large
kupik [55]

Answer:

2/3

Step-by-step explanation:

that the ratio of that number

8 0
1 year ago
On each trial of an experiment, a subject is presented with a constant soft noise, which is interrupted at some unpredictable ti
Julli [10]

Answer:

25th percentile = 202

80th percentile = 285

Step-by-step explanation:

Rearranging the values in increasing order

164

171

175

202

217

226

231

241

257

261

269

273

285

296

311

N = total number of variables = 15.

25th percentile = [(N + 1)/4]th variable = (15 + 1)/4 = 4th variable.

So, the 25th percentile = 4th variable = 202.

80th percentile = 0.8(N + 1) th variable = 0.8 × (15 + 1) = 12.8th variable = 13th variable = 285

6 0
3 years ago
Use the correct math operation to determine the unit price (price per ounce) for the 2-liter bottle priced at $1.39. (67.6 ounce
dsp73

Well to find this answer, you want to divide $1.39 by 67.6. When you do this you get 0.0205. This is roughly 2 cents per ounce.

4 0
3 years ago
Read 2 more answers
650 marked down to 475 what is the percent markdown
Aleksandr [31]
I'm not really sure, because 650 marked down by 27% would be 474.5, which is close but not exact.

Hope I helped a little bit, sorry if I'm wrong.
8 0
3 years ago
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