All categories

2 years ago

Work out, giving your answer in its simplest form: 3 3/4 × 2 4/5

Mathematics

1 answer:

Lady bird [3.3K]2 years ago

4 0

Answer:

⇒ $\frac{21}{2}$

⇒ $10 \frac{1}{2}$

Step-by-step explanation:

3 3/4 = 15/4

2 4/5 = 14/5

⇒ $(\frac{15}{4} *\frac{5}{5} )(\frac{14}{5} *\frac{4}{4} )$

⇒ $\frac{75}{20} *\frac{56}{20}$

⇒ $\frac{4200}{400}$

⇒ $\frac{21}{2}$

⇒ $10 \frac{1}{2}$

You might be interested in

There are 84 players on a football team. The ratio of offensive players to defensive players is 4 to 3. How many offensive playe

djverab [1.8K]

42 bcz idrc nvm bih idrc abt life

6 0

3 years ago

A person gets on and off a bathroom scale four times. The four readings (in pounds) are 148, 151, 150, and 152. Each time after

Ganezh [65]

Answer:

See explanation below

Step-by-step explanation:

Since each time after the person gets off the scale, the reading is 2 lb the person's weight must be near the mean of

148-2, 151-2, 150-2, 152-2; that is to say, near the mean of 146, 149, 148, 150 = (146+149+148+150)/4 = 148.25

We could estimate the uncertainty as the standard error SE

$\bf SE=\frac{s}{\sqrt{n}}$

where

s = standard deviation of the sample

n = 4 sample size.

Computing s:

$\bf s=\sqrt{\frac{(146-148.25)^2+(149-148.25)^2+(148-148.25)^2+(150-148.25)^2}{4}}=1.479$

So, the uncertainty is 1.479/2 = 0.736

It is not possible to estimate the bias, since it is the difference between the true weight and the mean, but we do not know the true weight.

5 0

3 years ago

Help picture below problem 8

Radda [10]

Answer:

C. never

Step-by-step explanation:

A trapezoid has exactly one pair of opposite sides parallel.

A parallelogram has exactly two pairs of opposite sides parallel.

A trapezoid is never a parallelogram.

6 0

2 years ago

Make x the subject of the formula w − y x = z

Licemer1 [7]

Answer:

hmm ..

just transfer the X at the right side and others on left side

Step-by-step explanation:

so you get

w-z = yx

so later

(w-z)/y = x

3 0

3 years ago

Identify the a b and c values of the following quadratic expression 4x^2+5x=4

yarga [219]

A is the 4

B is the 5

and C is also 4.

A is always the number in front of x^2. B is always the number i front of the normal x, and C is the number that is on the other side of the equal sign!

6 0

3 years ago

Work out, giving your answer in its simplest form: 3 3/4 × 2 4/5​

Work out, giving your answer in its simplest form: 3 3/4 × 2 4/5