7 times 3=parentheses blank times 3 parentheses divided parentheses 4 times 3 parentheses

Mathematics

1 answer:

babymother [125]3 years ago

6 0

Answer:

blank=x=84

Step-by-step explanation:

7*3=(3x)/(4*3)

21=3x/12 simplification

252=3x multiply by 12 on both sides

x=84 divide by three

You might be interested in

A store gives a customer 20% off if $10 or more amount of product is purchased. Otherwise the customer pays the usual price at c

Nadya [2.5K]

Answer:

The expected payment by the customer at the checkout is $9.

Step-by-step explanation:

The amount of the product is given as

$f(x)=\left \{ {{\frac{50}{x^3} \,\,\,\,\, x\geq 5 } \atop {0}} \right.$

Now the expected payment is given as

$EP=\int\limits^{10}_{5} {x f(x)} \, dx +\int\limits^{\infty}_{10} {0.8x f(x)} \, dx$

Here 0.8 x is used in the second integral because of the discount of 20% i.e. the expected price is 80% of the value such that

$\\EP=\int\limits^{10}_{5} {x \frac{50}{x^3}} \, dx +\int\limits^{\infty}_{10} {0.8x \frac{50}{x^3}} \, dx\\\\EP=\int\limits^{10}_{5} {\frac{50}{x^2}} \, dx +\int\limits^{\infty}_{10} {\frac{40}{x^2}} \, dx\\EP=[\frac{50}{-x}]_5^{10} +[\frac{40}{-x}]_{10}^{\infty} \\EP=[\frac{-50}{10}+\frac{50}{5}] +[\frac{-40}{\infty}+\frac{40}{10}]\\\\EP=-5+10+0+4\\EP=9$

The expected payment by the customer at the checkout is $9.

8 0

3 years ago

I giveeeeeeeeeeeeee brainlilsttttttttttttttttt

Paraphin [41]

Answer:

hows your day

Step-by-step explanation:

ill give your brain lets' back

8 0

3 years ago

Read 2 more answers

Linda saw an alligator in the zoo. Dylon told her he had seen an

lubasha [3.4K]

Answer:

Step-by-step explanation:

12-3=9

if dylon saw a 12 foot alligator that was 3 feet longer than the one linda saw to find out how long the alligator linda saw is, subtract the difference from the longer one12-3=9

8 0

3 years ago

Determine the point estimate of the population proportion, the margin of error

ahrayia [7]

Answer:

$\hat p=0.645\\\\ME=0.233\\\\x=645 \ individuals$