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3 years ago

Simplify the expression11x+9-7=?

Mathematics

2 answers:

Vesna [10]3 years ago

7 0

Answer:

11x+2

Step-by-step explanation:

11x+9-7

9-7=2

so 11x+2

b/c u can nat add normal numbers with variable numbers

kodGreya [7K]3 years ago

6 0

Answer:

11x=7-9

11x=-2

11x/11=-2/11

x=-0.18182

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To find the sum of 4 and -5.

Katen [24]

Answer:

-1

Step-by-step explanation:

-5 + 4 = 1

5 0

3 years ago

Two life insurance policies, each with a death benefit of 10,000 and a one-time premium of 500, are sold to a couple, one for ea

Kazeer [188]

Answer:896.9

Step-by-step explanation:

Let x denotes excess premium over claims

$E\left ( x|husband survives\right )$ , There are two possibilities

(i)Only husband survives

This can be possible with a possibility of 0.01

Claims=10,000

Premium collected $=2\times 500=1000$

Thus x=1000-10,000=-9000

(ii)Both husband and wife survives

This can occur with a probability of 0.96

Here claims will be 0 as both survives

Premium taken=1000

thus x=1000

The probability that the husband survives is the sum of above cases

=0.96+0.01=0.97

Hence the desired conditional Expectation $E\left ( x|Husband survives\right ) =0.01\times \left ( -9000\right )+0.96\times \left ( 1000\right )=896.9$

7 0

3 years ago

How do i solve this problem?

disa [49]

(4*3)+-4=8, this is just how to put it in the equation

6 0

3 years ago

Need an answer, please need an answer, please

trasher [3.6K]

Answer:

Step-by-step explanation:

Area = 192 m²

Perimeter= 56 m

Width = x m

Perimeter = 56

2*(length + width) = 56

Divide the equation by 2

l + x = 56/2

l + x = 28

l = 28 - x

Area = 192 m²

l * w = 192

(28 - x)*x = 192

28x - x*x = 192

0 = 192 - 28x + x²

x² - 28x + 192 = 0

2) Equation is a quadratic equation. The roots of this equation will the dimensions of the rectangular plot.

3) The roots represent the width and length of the rectangle.

x² - 28x +192 = 0

Sum = -28

Product =192

Factors = -16 , -12 {-16 +(-12) = -28 & (-12)*(-16) = 192}

x² - 28x + 192 = 0

x² - 12x - 16x + (-16)*(-12) = 0

x(x -12) - 16(x - 12) = 0

(x - 12)(x -16) =0

x -12 = 0 ; x - 16 = 0

x = 12 ; x = 16

x = 12 ,16

4) Sum of the roots = 12 + 16 = 28

Sum of the roots = half of the perimeter

5) Product of the roots = 12*16 = 192 = area of the rectangle.

6 0

2 years ago

Consider randomly selecting a student at a large university, and let A be the event that the selected student has a Visa card an

poizon [28]

Answer:

We have that $B = 0.3$ .

$0.3 = b + (A \cap B)$

However, b is a probability, which means that it cannot be negative. So no, P(A ∩ B) cannot be 0.5. It can, at most, be 0.3.

Step-by-step explanation:

Event A:

Probability that a student has a Visa card.

Event B:

Probability that the student has a MasterCard.

We have that:

$A = a + (A \cap B)$

In which a is the probability that a student has a Visa card but not a MasterCard and $A \cap B$ is the probability that a student has both these cards.