All categories

3 years ago

-3/5 - 7/5 - -2/5 equals

Mathematics

2 answers:

gregori [183]3 years ago

8 0

The answer is -8/5.....

12345 [234]3 years ago

6 0

I think it equals -1.6.

You might be interested in

Ally picked 25 roses. She gave away 10 roses. What percent of the roses does Ally still have?

MArishka [77]

Answer:

She still has 60%

Step-by-step explanation:

First you make the 25 a 100 which is basically multiply by 4 which you should do the same for 10

so 40/100 is how much she game away

She gave away 40%

She still has 60%

3 0

3 years ago

Read 2 more answers

Order fractions smallest to biggest 3/4, 1/3, 1/2, 4/6, 5/12

True [87]

Answer:

5/12,4/6,3/4,1/3,1/2

Step-by-step explanation:

5 0

3 years ago

The angle measures in a triangle are in the ratio 1:3:5. The longest side of the triangle measures 5 inches. What is the approxi

Lelechka [254]

X + 3x + 5x = 180
9x = 180
x = 20
So the angles are
20
60 and
100

Let's say longest side is c, its length is 5 and it is opposite angle C.

Using the Law of Sines: http://www.1728.org/trigtut2.htm

c / sin(C) = b / sin (B)
5 / sin (100) = b / sin (60)
5 * sin (60) / sin(100) = side b
5 * 0.86603 / 0.98481 = side b
4.33015 / 0.98481 = side b
side b = 4.3969395112 

Using the Law of Sines Again:
c / sin(C) = a / sin (A)
5 / sin (100) = a / sin (20)
5 / 0.98481 = a / 0.39073
5 * 0.34202 / 0.98481 = side a
1.7101 / .98481 = side a
side a = 1.736477087 

SO, perimeter =
5 (side c) plus
 4.3969395112 (side b) plus
1.736477087 (side a) 


 11.1334165982 TOTAL

6 0

3 years ago

Read 2 more answers

Heyyy im back and i need some edvice !! ttm!!

frez [133]

Answer:

abt wat

Step-by-step explanation:

6 0

3 years ago

Examination of court records in a particular state shows that the mean sentence length for first-offense drug dealers is 26 mont

Zigmanuir [339]

Answer and explanation:

Given : Examination of court records in a particular state shows that the mean sentence length for first-offense drug dealers is 26 months with a standard deviation of 2 months. The records show that the sentence lengths are normally distributed.

i.e. Mean $\mu=26$ , Standard deviation $\sigma=2$

Using Z-score formula,

$Z=\frac{\bar{x}-\mu}{\sigma}$

1) What is the Z score for a 23 month sentence length? What is the probability of getting a sentence below that?

The Z score value for a $\bar{x}=23$ is given by,

$Z=\frac{23-26}{2}$

$Z=\frac{-3}{2}$

$Z=-1.5$

The probability of getting a sentence below that is $P(X$

i.e. $P(X$

$P(X$

2) A defense attorney is concerned that his client's sentence was unusually harsh at 30 months. What percent of sentences are 30 months or longer? Calculate the Z score and report the area.

The Z score value for a $\bar{x}=30$ is given by,