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ladessa [460]
3 years ago
6

4)

Mathematics
1 answer:
Gnesinka [82]3 years ago
8 0

Answer:

a is 25 b is 15 percent

Step-by-step explanation:

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If the sum of two numbers is 10 and the diffference is 6, find the numbers​
defon
8 and 2
8+2 = 10
8-2 = 6
7 0
2 years ago
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Use the discriminant to determine how many real number solutions exist for the quadratic equation –4j2 + 3j – 28 = 0. A. 3 B. 2
Zepler [3.9K]

Answer:

C. 0

Step-by-step explanation:

–4j^2 + 3j – 28 = 0

The discriminant is b^2-4ac  if >0 we have 2 real solutions

                                                   =0  we have 1 real solutions

                                                   <0 we have 2 imaginary solutions

a = -4, b =3  c = -28

b^2 -4ac

(3)^2 - 4(-4)*(-28)

9 - 16(28)

9 -448

This will be negative so we have two imaginary solutions.

Therefore we have 0 real solutions

5 0
3 years ago
A study of a company's practice regarding the payment of invoices revealed that an invoice was paid an average of 20 days after
morpeh [17]

Answer:

=0.1587 or 15.87%

So option A is correct answer so 15.87% of the invoices were paid within 15 days of receipt.

Step-by-step explanation:

In order to find the percent of the invoices paid within 5 days of receipt we have to find the value of Z first.

Z=\frac{X-u}{S}

where:

X is the random varable which in our case is 15 days

u is the mean or average value which is 20 days

S is the standard deviation which is 5 days

Z=\frac{15-20}{5}

Z=-1.0

We have to find Probability at Z less than -1

P(Z<-1.0) which can be written as:

=1-P(Z>1.0)

From Cumulative distribution table:

=1-(0.3413+0.5)

=0.1587 or 15.87%

So option A is correct answer so 15.87% of the invoices were paid within 15 days of receipt.

7 0
3 years ago
A(b + c) = a • b + a • c, where a, b, and c are real numbers
blagie [28]

Answer:

a(b + c) = a • b + a • c

=> 8(3 + 4) = 8.3 + 8.4 = 24 + 32

Step-by-step explanation:

4 0
3 years ago
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What is the value of the expression 18-2x(4+3)
Yanka [14]

Answer:

12-8x

Step-by-step explanation:

18-2x(4+3) =

18 -8x -6 =

12 -8x

3 0
3 years ago
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