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Bad White [126]
3 years ago
9

3/4 -2 4/5 I NEED HELP ASAP PLS HELP ME

Mathematics
2 answers:
Basile [38]3 years ago
6 0

Answer:

-41/20

Step-by-step explanation:

Hi there!

From the question, I believe you’re asking \frac{3}{4} - 2 \frac{4}{5}

First, put the whole number 2 back into the fraction to create an improper fraction.

This would become \frac{14}{5}. Now, we have to find a common denominator between the two fractions. Both 4 and 5 can go into 20, so that will be our common denominator. To turn \frac{3}{4} into a fraction with a denominator of 20, we have to multiply both the numerator and denominator by 5. \frac{3}{4} becomes \frac{15}{20}. We do the same thing for \frac{14}{5} except we multiply the numerator and denominator by 4. We end up with \frac{56}{20}. Now we just have to subtract!

\frac{15}{20} - \frac{56}{20} leaves us with - \frac{41}{20} , which can’t be simplified any further.

steposvetlana [31]3 years ago
5 0

Answer:

-2.05, in fraction form it would be -2 1/20

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I need this ASAP Solve: 2x-10/4= 3x
Dovator [93]
X= -5/2 (0.4)

or

x= -2 1/2 (2.5)
4 0
3 years ago
Estimate the sum 8/10 + 1/9
RideAnS [48]

Answer:

41/45

Step by Step Explanation:

Add: 8/

10

+ 1/

9

= 8 · 9/

10 · 9

+ 1 · 10/

9 · 10

= 72/

90

+ 10/

90

= 72 + 10/

90

= 82/

90

= 2 · 41/

2 · 45

= 41/

45

For adding, subtracting, and comparing fractions, it is suitable to adjust both fractions to a common (equal, identical) denominator. The common denominator you can calculate as the least common multiple of both denominators - LCM(10, 9) = 90. In practice, it is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 10 × 9 = 90. In the following intermediate step, cancel by a common factor of 2 gives 41/

45

.

In other words - eight tenths plus one ninth = forty-one forty-fifths.

8 0
2 years ago
Write the formula to calculate how much dough is prepared in x hours.
spin [16.1K]

Answer: D(x) = 2kg/h*x

where x is the number of hours.

Step-by-step explanation:

The information that we have is:

in 5 hours, we can prepare 10kg of dough.

With this, we can find the rate per hour, to do this we find the quotient:

R = 10kg/5h = 2kh/h

This meeans that in one hour, we can make 2kg of dough.

Then, in x hours, we can make x times 2kg of dough, then the equation will be:

D(x) = 2kg/h*x

where x is the number of hours.

5 0
3 years ago
A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean
EastWind [94]

Using the normal distribution, it is found that 7.64% of of sample means are greater than 8.8 hours.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

Z = \frac{X - \mu}{\sigma}

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.
  • By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation s = \frac{\sigma}{\sqrt{n}}.

The parameters are given as follows:

\mu = 8.4, \sigma = 1.77, n = 40, s = \frac{1.77}{\sqrt{40}} = 0.2799

The proportion of sample means greater than 8.8 hours is <u>one subtracted by the p-value of Z when X = 8.8</u>, hence:

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{8.8 - 8.4}{0.2799}

Z = 1.43

Z = 1.43 has a p-value of 0.9236.

1 - 0.9236 = 0.0764.

7.64% of of sample means are greater than 8.8 hours.

More can be learned about the normal distribution at brainly.com/question/25800303

#SPJ1

6 0
2 years ago
find the area of the shaded region of circle y below. Round your answer to the nearest tenth if necessary
S_A_V [24]

Answer:

  285.6 square units

Step-by-step explanation:

The shaded area can be described a a whole circle less a 90° segment, or as a 3/4 circle with a right triangle added. The formula for the segment area is that of a sector less the triangle, so the computation is the same either way.

__

<h3>3/4 circle area</h3>

The area of a circle is given by ...

  A = πr²

so 3/4 of a circle is 3/4 this value:

  3/4 circle area = (3/4)(π)(10²) = 75π . . . . square units

<h3>Triangle area</h3>

The area of the isosceles right triangle is given by ...

  A = 1/2s²

  A = 1/2(10²) = 50 . . . . square units

<h3>Shaded area</h3>

The shaded area is the sum of these two ...

  shaded area = 3/4 circle area + right triangle area

  shaded area = 75π + 50 ≈ 285.6 . . . . square units

8 0
2 years ago
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