All categories

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

You might be interested in

Please help i have no idea how to answer this

BabaBlast [244]

Answer: 1/32
Multiple 1/4 x 1/8 to get your answer

4 0

2 years ago

Read 2 more answers

The exponential distribution applies to lifetimes of a certain component. Its failure rate is unknown. Find the probability that

wlad13 [49]

Answer:

a) 0.0821

b) 0.0111

c) 0.0041

Step-by-step explanation:

Exponential distribution:

The exponential probability distribution, with mean m, is described by the following equation:

$f(x) = \lambda e^{-\lambda x}$

In which $\lambda$ is the decay parameter.

The probability that x is lower or equal to a is given by:

$P(X \leq x) = \int\limits^a_0 {f(x)} \, dx$

Which has the following solution:

$P(X \leq x) = 1 - e^{-\lambda x}$

Either it lasts more 5 years or less, or it survives more than 5 years. The sum of the probabilities of these events is decimal 1. So

$P(X \leq 5) + P(X > 5) = 1$

In all 3 cases, we want P(X > 5). So

$P(X > 5) = 1 - P(X \leq 5)$

In which

$P(X \leq 5) = 1 - e^{-5\lambda}$

(a) lambda=.5

$P(X \leq 5) = 1 - e^{-5*0.5} = 0.9179$

$P(X > 5) = 1 - P(X \leq 5) = 1 - 0.9179 = 0.0821$

(b) lambda=0.9

$P(X \leq 5) = 1 - e^{-5*0.9} = 0.9889$

$P(X > 5) = 1 - P(X \leq 5) = 1 - 0.9889 = 0.0111$

(c) lambda=1.1

$P(X \leq 5) = 1 - e^{-5*1.1} = 0.9959$

$P(X > 5) = 1 - P(X \leq 5) = 1 - 0.9959 = 0.0041$

7 0

3 years ago

What type of symmetry does a regular pentagon have

solong [7]

Just a regular pentagon has 5 sides. and also has 5 lines of symmetry.

So if a shape has 7 sides it will have 7 lines of symmetry.

Its always going to be the same number.

plz mark me as brainliest :)

8 0

3 years ago

On the photo /picture

asambeis [7]

We need to compute the diagonal of yhe square.

d²=7²+7²=49×2cm²

d=7×sqrt(2)=7×1.41=9.87cm.

The diagonal we just computed is the diameter of the circle that contains the square.

Since d=9.87 < 11, then indeed, the square fits inside the circle, without touching it.

6 0

3 years ago

Choose the correct simplification of the expression −3x2(5x − 4x2 − 6).

Bess [88]

Answer B.
$- 3 {x}^{2} (5x - 4 {x}^{2} - 6) \\ = - 15 {x}^{3} + 12 {x}^{4} + 18 {x}^{2} \\ = 12 {x}^{4} - 15 {x}^{3} + 18 {x}^{2}$

8 0

3 years ago

Read 2 more answers