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3 years ago

Which of the following shows the correct solution steps and solution to 7x-4= -18?

Mathematics

1 answer:

Leya [2.2K]3 years ago

3 0

The second one because look at what everything’s it adds up to add it all up and you get the second one

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A crew of highway workers paved 12 mile in 14 hour. If they work at the same rate, how much will they pave in one hour?

ratelena [41]

Answer:

0.857 miles in 1 hour

Step-by-step explanation:

It is given that,

A crew of highway workers paved 12 mile in 14 hour.

We need to find how much will they pave in 1 hour if they work at the same rate.

14 hours = 12 miles

To find how much they pave in 1 hour, we must divide 12 by 14 as follows :

$1\ \text{hour}=\dfrac{12}{14}\ \text{miles}\\\\=0.857\ \text{miles}$

Hence, they pave 0.857 miles in 1 hour.0.857 miles in 1 hour.

8 0

3 years ago

In a couple of sentences and your own words describe how to re-write an expression that's in radical form into an expression wit

Serga [27]

In order to rewrite an expression in radical form using exponents, we must consider the power of the root (is the radical the typical square root, cubed root, etc) and the value of any exponents contained in the radical.

Using this information, we will make the power of the radical the denominator of our exponent, and whatever exponent is contained in the radical will become the numerator.

Example:
√(x³) = square root of x³ = x^(3/2)

3 0

4 years ago

Dividing whole numbers how woukd u solve 86÷2

gizmo_the_mogwai [7]

Answer:

Step-by-step explanation:

You chop 86 in half , it’s 43.

Think of it this way- 2 goes into 86 43 times

5 0

3 years ago

Read 2 more answers

Here goes my 3 question

Anastaziya [24]

It's a because the form for being proportional is
ab=k
or
a/b=k
4/6=k
4 times 6=k

then 5 times 7=k
false so

so there is no ratio so the answer is A

3 0

4 years ago

A research team at Cornell University conducted a study showing that approximately 10% of all businessmen who wear ties wear the

LenKa [72]

Answer:

a) The probability that at least 5 ties are too tight is P=0.0432.

b) The probability that at most 12 ties are too tight is P=1.

Step-by-step explanation:

In this problem, we could represent the proabilities of this events with the Binomial distirbution, with parameter p=0.1 and sample size n=20.

a) We can express the probability that at least 5 ties are too tight as:

$P(x\geq5)=1-\sum\limits^4_{k=0} {\frac{n!}{k!(n-k)!} p^k(1-p)^{n-k}}\\\\P(x\geq5)=1-(0.1216+0.2702+0.2852+0.1901+0.0898)\\\\P(x\geq5)=1-0.9568=0.0432$

The probability that at least 5 ties are too tight is P=0.0432.

a) We can express the probability that at most 12 ties are too tight as:

$P(x\leq 12)=\sum\limits^{12}_{k=0} {\frac{n!}{k!(n-k)!} p^k(1-p)^{n-k}}\\\\P(x\leq 12)=0.1216+0.2702+0.2852+0.1901+0.0898+0.0319+0.0089+0.0020+0.0004+0.0001+0.0000+0.0000+0.0000\\\\P(x\leq 12)=1$

The probability that at most 12 ties are too tight is P=1.

5 0

3 years ago