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2 years ago

Solve the product of seven and a number plus four is 18

Mathematics

2 answers:

Anvisha [2.4K]2 years ago

8 0

Answer:

My mistake! The missing number is 2.

Also 7 in addition.

Step-by-step explanation:

First, let's solve 18 - 4 - 7.
18 - 4 = 14 - 7 = 7.
Now, let's add up them to check.
7 + 7 = 14 + 4 = 18.
Another equation.
7 * 2 + 4 = 18.
The missing number is 2.
In just addition, the missing number is 7.
Hope this helps.

IrinaVladis [17]2 years ago

6 0

Answer:

the missing number is 2

Step-by-step explanation:

convert to a equation

7x + 4 = 18

subtract 4 from both sides: 7x = 14

divide both sides by 7: x = 2

the missing number is 2

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What word matches the definition “the largest number that divides exactly into two or more numbers”

Ahat [919]

Answer:

Greatest or greatest common factor

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

When 2 is added to the difference between six times a number and 5, the result is greater than 13 added to 5 times the number. F

Elina [12.6K]

let x is the number

2 + (6x - 5) > 13 + 5x

2 + 6x - 5 > 13 + 5x

6x - 3 > 13 + 5x

6x - 5x > 13 + 3

x > 16

8 0

3 years ago

The on-line access computer service industry is growing at an extraordinary rate. Current estimates suggest that only 20% of the

vitfil [10]

Answer:

The probability is 0.4207

Step-by-step explanation:

The probability of a home-based computer having access to on-line services is p = 0.2 (data from the exercise)

Then, the probability of a home-based computer not having access to on-line services is p = 1 - 0.2 = 0.8

We are going to use this probability (p = 0.8) to solve the exercise.

Let's define the random variable X

X : ''Number of home-based computers not having access to on-line services''

X can be modeled as a binomial random variable

X ~ Bi(p,n)

X ~Bi(0.8,25)

Where p is the success probability and n is the number of Bernoulli independent experiments we are taking place.

We are going to count ''a success'' as a computer not having access to on-line services.

The binomial probability function is :

$P(X=x)=(nCx)p^{x}(1-p)^{n-x}$

Where P(X=x) is the probability of the random variable X to assume the value x

nCx is the combinatorial number define as

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

p is the success probability and n the number of Bernoulli independent experiments taking place.

In our exercise,

$p=0.8\\n=25$

We are looking for :

$P(X>20)=P(X=21)+P(X=22)+P(X=23)+P(X=24)+P(X=25)$

$P(X>20)=(25C21)0.8^{21}0.2^{4}+(25C22)0.8^{22}0.2^{3}+(25C23)0.8^{23}0.2^{2}+(25C24)0.8^{24}0.2^{1}+(25C25)0.8^{25}0.2^{0}$

$P(X>20)=0.1867+0.1358+0.0708+0.0236+0.8^{25}$

$P(X>20)=0.4207$

Finally, the probability of finding that more than 20 of 25 home-based computers do not have access to on-line services is 0.4207

6 0

3 years ago

What is thirty four and twelve hundredths in standard form?

Marat540 [252]

It stands for 34.12 in stander form

5 0

3 years ago

Read 2 more answers

Which of the following is not a solution to the system of linear equations below?

ra1l [238]

Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}5y=3x+15&\text{subtract 3x from both sides}\\6x=10y-30&\text{subtract 10y from both sides}\end{array}\right\\\left\{\begin{array}{ccc}-3x+5y=15\\6x-10y=-30&\text{divide both sides by 2}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}-3x+5y=15\\3x-5y=-15\end{array}\right}\\.\qquad0=0\qquad\bold{TRUE}\\\\\bold{Infinitely\ many\ solutions}\\\\5y=3x+15\qquad\text{divide both sides by 5}\\\\y=\dfrac{3}{5}x+3\qquad(*)\\\\\text{Put the coordinates of the points to the equation (*)}$

$A.\ (5,\ 6)\\\\6=\dfrac{3}{5}(5)+3\\\\6=3+3\\\\6=6\qquad\bold{CORRECT}\\\\B.\ (-15,\ 12)\\\\12=\dfrac{3}{5}(-15)+3\\\\12=(3)(-3)+3\\\\12=-9+3\\\\12=-6\qquad\bold{FALSE}\\\\C.\ (0,\ 3)\\\\3=\dfrac{3}{5}(0)+3\\\\3=0+3\\\\3=3\qquad\bold{CORRECT}\\\\D.\ (-10,\ -3)\\\\-3=\dfrac{3}{5}(-10)+3\\\\-3=(3)(-2)+3\\\\-3=-6+3\\\\-3=-3\qquad\bold{CORRECT}$

5 0

4 years ago