All categories

3 years ago

Evaluate. 43 – 10 ÷ 2 + [(7 + 3) • 3]

Mathematics

2 answers:

bulgar [2K]3 years ago

8 0

LUCKY_DIMON [66]3 years ago

6 0

Answer:

Value of 43 – 10 ÷ 2 + [(7 + 3) • 3] is 68 .

Step-by-step explanation:

As the expression given in the question be as follow .

= 43 – 10 ÷ 2 + [(7 + 3) • 3]

It also written as

$= 43 - \frac{10}{2}+ [(7+3)\times 3]$

$= 43 - 5+ [7\times 3+3\times 3]$

$= 43 - 5+ [21+9]$

$= 43 - 5+ [30]$

= 43 -5 +30

= 73 -5

= 68

Therefore the value of 43 – 10 ÷ 2 + [(7 + 3) • 3] is 68 .

You might be interested in

3/4x - 5y = 7<br> X = -4y + 12<br><br> solve by substitution ! show work pls !!

tamaranim1 [39]

When using substitution, we are imputing an equation in place of a variable to eliminate one of the variables in the equation so that we can solve for the remaining variable.

For this example, we will be plugging in (-4y+12) wherever "x" is in the other equation.

3/4 x -5y = 7
3/4(-4y+12) -5y =7
((3/4)(-4y))+((3/4)12)-5y=7
-3y+9-5y=7
-8y= -2
y=(1/4)

Now find "x" by plugging in the y-value.
x=(-4*(1/4))+12
x= -1 +12
x=11

any questions? feel free to comment below!

8 0

2 years ago

the water level in a full water tank changes by the same amount each day when the tank gets a leak. the total change in the wate

vovangra [49]

it lost 128 gallons in 16 days so divide 128 by 16 to find the daily lost

128/16 = 8 gallons a day were lost

5 0

3 years ago

Read 2 more answers

What is the vertex form of f(x)=2x2+ 6x -8

aev [14]

Hopefully this helped!!

7 0

2 years ago

Read 2 more answers

Based on aâ poll, among adults who regret gettingâ tattoos, 18â% say that they were too young when they got their tattoos. Assum

Sergeeva-Olga [200]

Answer:

a) 20.44% probability that none of the selected adults say that they were too young to get tattoos.

b) 35.90% probability that exactly one of the selected adults says that he or she was too young to get tattoos.

c) 56.34% probability that the number of selected adults saying they were too young is 0 or 1.

d) No

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they say they were too young when they got their tattoos, or they don't say that. Each adult is independent of each other. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

18% say that they were too young when they got their tattoos.

This means that $p = 0.18$

Eight adults who regret getting tattoos are randomly selected

This means that $n = 8$

a. Find the probability that none of the selected adults say that they were too young to get tattoos.

This is P(X = 0).

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{8,0}.(0.18)^{0}.(0.82)^{8} = 0.2044$

20.44% probability that none of the selected adults say that they were too young to get tattoos.

b. Find the probability that exactly one of the selected adults says that he or she was too young to get tattoos.

This is P(X = 1).

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 1) = C_{8,1}.(0.18)^{1}.(0.82)^{7} = 0.3590$

35.90% probability that exactly one of the selected adults says that he or she was too young to get tattoos.

c. Find the probability that the number of selected adults saying they were too young is 0 or 1.

Either a. or b.

20.44 + 35.90 = 56.34

56.34% probability that the number of selected adults saying they were too young is 0 or 1.

d. It we randomly select 9 adults. Is 1 a significantly low number who day that they were too young to get tattoos?

Now $n = 9$

It is significantly low if it is more than 2.5 standard deviations below the mean.

The mean is $E(X) = np = 9*0.18 = 1.62$

The standard deviation is $\sqrt{V(X)} = \sqrt{n*p*(1-p)} = \sqrt{9*0.18*0.82} = 1.15$

1 > (1.62 - 2.5*1.15)

So the answer is no.

5 0

2 years ago

what is the total cost of a pair of shoes for 78.95 in two sweaters at 36.99 each with a 7% sales tax

Llana [10]

Hello!

The Question asked is simpler then you may expect! All you need to do is multiply the two numbers by 1.07 to find the answer which is,

$84.48 <em>and </em>$39.58

if the question is asking for them to be combined it would be $124.06.

<h3>Hope this helps!</h3>

3 0

2 years ago

Read 2 more answers