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pav-90 [236]
1 year ago
7

What is the value of the expression 4 x (2a - 1) if a = 3? 16 20 23 25

Mathematics
2 answers:
valentinak56 [21]1 year ago
6 0
3x2=6-1=5 then 5x4=20
olga_2 [115]1 year ago
4 0

Answer:

20

Step-by-step explanation:

⇒ Multiply 2 by 3

2 * 3 = 6

4 (6 - 1)

⇒ Distribute terms

4 * 5

20

Hence, the answer is 20.

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(-6.7x 2 + 2.3x y + 5.2) - (-14.9x 2 - 3.5x y + 7.1)
Kruka [31]
9.6x^2 + 5.8xy - 2.1

7 0
3 years ago
Find the lateral area for the given cylinder. use 3.14 for pi and round to the nearest whole number
OverLord2011 [107]
Formula for lateral area of cylinder:
AA_{L}=2 \pi rh
Here r=6 units and h=26 units
Put values in formula.
A _{L} =2(3.14)(6)(26) \\ A_{L}=980\ square \ units \\
(rounded to nearest whole number)

Answer: Lateral area of cylinder= 980 square units
5 0
3 years ago
Read 2 more answers
If (-3, y) lies on the graph of y = 3-x, then y =
AnnyKZ [126]

Answer:

y=6

Step-by-step explanation:

y=3-x

x=-3

y=3-(-3)

y= 3+3

y=6

7 0
2 years ago
The screening process for detecting a rare disease is not perfect. Researchers have developed a blood test that is considered fa
lesya692 [45]

Answer:

Type I: 1.9%, Type II: 1.6%

Step-by-step explanation:

given null hypothesis

H0=the individual has not taken steroids.

type 1 error-falsely rejecting the null hypothesis

⇒   actually the null hypothesis is true⇒the individual has not taken steroids.

 but we rejected it ⇒our prediction is the individual has taken steroids.

typr II error- not rejecting null hypothesis when it has to be rejected

⇒actually null hypothesis is false ⇒the individual has taken steroids.

but we didnt reject⇒the individual has not taken steroids.

let us denote

the individual has taken steroids by 1

the individual has not  taken steroids.by 0

                            predicted

                              1       0

   actual          1    98.4%  1.6%

                        0   1.9%   98.1%

so for type 1 error  

 actual-0

predicted-1

therefore from above table we can see that probability of Type I error is 1.9%=0.019

so for type II error

   actual-1

predicted-0

therefore from above table we can see that probability of Type I error is 1.6%=0.016

5 0
3 years ago
What value of n makes the equation 2(n+1)=-3(n-8)+3 true
LekaFEV [45]
<h3>Solution:</h3>

2(n + 1) =  - 3(n - 8) + 3 \\  =  > 2n + 2 =  - 3n + 24 + 3 \\  =  > 2n + 3n = 24 + 3 - 2 \\  =  > 5n = 25 \\  =  > n =  \frac{25}{5}  \\  =  > n = 5

<h3>Answer:</h3>

5

<h3>Hope it helps.</h3>

ray4918 here to help

4 0
3 years ago
Read 2 more answers
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