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rusak2 [61]
3 years ago
8

Given a+b=7 and a–b=3, find: 2a·2b

Mathematics
1 answer:
nekit [7.7K]3 years ago
5 0
I believe the answer is 40
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If the principal amount of $3,575 earned $1,072 in 3 years find the interest rate​
Jlenok [28]

u are gay but it would be 2,432

8 0
3 years ago
Which equation has the same solution as x2 - 6x – 14 = 0?<br>how i do this​
Stells [14]

Answer: 1.79

Step-by-step explanation: x2−6x−14=0

For this equation: a=1, b=-6, c=-14

1x2+−6x+−14=0

Step 1: Use quadratic formula with a=1, b=-6, c=-14.

x=

−b±√b2−4ac

2a

x=

−(−6)±√(−6)2−4(1)(−14)

2(1)

x=

6±√92

2

x=3+√23 or x=3−√23

Answer:

x=3+√23 or x=3−√23= 1.79

5 0
3 years ago
Find the critical value tc for the confidence level cequals 0.95 and sample size nequals 19.
Alex_Xolod [135]

The critical values are fixed values which can be obtained from the standard t crit  tables. We can find the critical value tc when the degrees of freedom and confidence level are given. The degrees of freedom is simply:

Degrees of Freedom = Number of samples – 1

Degrees of Freedom = 19 – 1

Degrees of Freedom = 18

From the t critical tables, the tc corresponding to Degrees of Freedom equal to 18 and Confidence level equal to 95% is as follows:

tc = 2.101

Therefore this means that any t value beyond 2.101, we already reject the null hypothesis.

8 0
3 years ago
I am thinking of a number.
mash [69]

Answer:

21

Step-by-step explanation:

Let x be that number.

12x-216=2x-6

12x-2x=-6+216

10x=210

10x/10=210/10

x=21

21 is the number.

8 0
3 years ago
Read 2 more answers
I need help in the answer it’s math
slega [8]

E

Step-by-step explanation:

lolkyuhgt5jjnnnnnnneeeee

7 0
3 years ago
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