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kiruha [24]
3 years ago
13

Solve this equation -4 + x = 9

Mathematics
1 answer:
Alex777 [14]3 years ago
3 0

Answer:

Here is your Answer = 13

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Is - (- 1 1/2 ) located to the right or left of zero?
Bess [88]

As the number -1 1/2 would be to the left because it is negative, if it is as the number's integer, then the new number would be 1 1/2 because 1 1/2 and -1 1/2 are integers.

Hope this helps, if not, comment below please!!!!

5 0
3 years ago
Which pairs of measures could be the measures of∠A and ∠C?<br> Select all that apply.
gladu [14]

Answer:

A, 55, 55

B, 30, 30

E, 45, 90

Are the possible choices for the measures <A and <C. Hope this helps!

5 0
3 years ago
A certain brand of refrigerator has a useful life that is normally distributed with mean 10 years and standard deviation 3 years
juin [17]

Answer: 0.55567

Step-by-step explanation:

Given : A certain brand of refrigerator has a useful life that is normally distributed with mean 10 years and standard deviation 3 years. The useful lives of these refrigerators are independent.

i.e.

\mu=10\text{ years}\\\sigma=3\text{ years}

Let X_1 and X_2 are two randomly selected refrigerator's life whose sum will exceed third selected refrigerator X_3 .

So that, X =X_1+X_2-1.9\times X_3

Mean =E(X_1)+E(X_2)-E(X_3)=10+10-1.9\times10 =1

Standard deviation =\sqrt{(Var(X_1)+Var(X_1)+Var(X_1))}

=\sqrt{(3^2+3^2+(1.9\times3)^2)}

=7.1056315694

Z-score : z=\dfrac{X-E[x]}{\sqrt{Var[x]}}=\dfrac{0-1}{7.0156315694}\approx-0.14

Now , The  probability that the total useful life of two(i..e n=2) randomly selected refrigerators will exceed 1.9 times the useful life of a third randomly selected refrigerator would be :-

P(Z>-0.14)=P(Z

Hence, the required probability is 0.55567.

3 0
3 years ago
What is the greatest common factor of 42a^5b^3, and 42ab^4
kotegsom [21]
The greatest common factor of 36x3 and 8x is simply 4X
7 0
3 years ago
Which system of equations is represented in the graph? On a coordinate plane, a horizontal line is at y = negative 2 and another
NISA [10]

Answer:

(A)y = -2,   x-2y =6.

Step-by-step explanation:

On the graph, we have two lines:

  • y = -2
  • The line that goes through (0, -3) and (6, 0).

To determine the equation of the second line, we use the slope-intercept form: y=mx+b

Slope, m

=\dfrac{0-(-3)}{6-0} \\=3\div 6 \\=\dfrac{1}{2}

So we have:

y=\dfrac{1}{2}x+b

When x=0, y=-3

-3=\dfrac{1}{2}(0)+b\\b=-3

Therefore, the second equation is:

y=\dfrac{1}{2}x-3\\$Multiplying all through by 2, we have:\\2y=x-6

Rearranging: x-2y=6

The system of equations that is represented in the graph is:

  • y = -2.
  • x-2y =6.

The correct option is A.

7 0
3 years ago
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