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Ksju [112]
4 years ago
9

X2 + 20 = 40 .... What is X​

Mathematics
2 answers:
Tju [1.3M]4 years ago
7 0

Answer:

2x +20=40

=)2x=40-20

= )x \:  =  \frac{20}{2}

=) x =10

TEA [102]4 years ago
6 0

Answer:

10

Step-by-step explanation:

x2+20=40

20-40=x2

x2=20

20÷2=x

x=10

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In order to get an. A in science,Jack must get at least 92% on his next test. If tbe test has 30 questions, what is the minimum
GaryK [48]

Answer:

Jack must Answer minimum 28 question correctly in order to get A in Science.

Step-by-step explanation:

Given:

Percentage required = 92%

Total Number of question = 30

We need to find the number of Question answer correctly.

Solution:

number of Question answer correctly be 'x'

So we can say that;

number of Question answer correctly divided by Total Number of question multiplied by 100 should be greater than or equal to percentage required.

framing in equation form we get;

\frac{x}{30}\times 100\geq 92\\\\\frac{10x}{3}\geq 92

Now Dividing both side by \frac{3}{10} we get;

\frac{3}{10}\times \frac{10x}{3}\geq 92\times \frac3{10}\\\\x\geq 27.2

Hence Jack must Answer minimum 28 question correctly in order to get A in Science.

3 0
3 years ago
There are 4 contestants in a beauty pageant. How many results are possible for the first, second, and third place?
WINSTONCH [101]
<h3>Answer:  24</h3>

Explanation:

There are 4 choices for first place, 3 choices for second place, and 2 choices for third place. Overall, there are 4*3*2 = 24 permutations.

4 0
3 years ago
Randy has a box of baseball cards. it is 8 1/2 inches long, 5 inches wide, and 3 1/4 inches high. what is the volume of the base
Gwar [14]
Okay! Volume of a box is height times width times length. Basically, multiply all of your numbers together.
8.5 times 5 times 3.25 is 138.125 inches cubed.
6 0
3 years ago
Read 2 more answers
A small manufacturing firm has 250 employees. Fifty have been employed for less than 5 years and 125 have been with the company
sukhopar [10]

Answer:

Step-by-step explanation:

Given that a small manufacturing firm has 250 employees. Fifty have been employed for less than 5 years and 125 have been with the company for over 10 years. So remaining 75 are between 5 and 10 years.

Suppose that one employee is selected at random from a list of the employees

A) Probability that the selected employee has been with the firm less than 5 years = \frac{50}{250 } \\= 0.20

B) Probability that the selected employee has been with the firm between 5 and 10 years

= \frac{75}{250 } \\= 0.30

C) Probability that the selected employee has been with the firm more than 10 years

= \frac{125}{250} =0.50

a) P(A) = 0.2

P(C) = 0.5

P(A or B) = 0.2+0.3 = 0.5

P(A and C) = 0 (since A and C are disjoint)

7 0
3 years ago
I need help asap :):):):)
Georgia [21]

Answer:

b

Step-by-step explanation:

3 0
4 years ago
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