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olga2289 [7]
2 years ago
15

What is the value of 5a when a=7 ?

Mathematics
2 answers:
Mariulka [41]2 years ago
7 0

Answer:

35

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Brums [2.3K]2 years ago
7 0
It’s 35. when you have a letter right next to a number it means multiply. so this is asking 5x7
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(4x 2 − 2x + 10) + (−2x 2 + 4x − 2)
Mariulka [41]

Answer:

2x²+2x+8

Step-by-step explanation:

4x²-2x+10-2x²+4x-2

=4x²-2x²-2x+4x+10-2

=2x²+2x+8

6 0
3 years ago
Can somebody help me find the area of the shape asap
Natasha_Volkova [10]

Answer:

41.09 {cm}^{2}

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6 0
3 years ago
Of all of the individuals who develop a certain rash, suppose the mean recovery time for individuals who do not use any form of
VashaNatasha [74]

Answer:

z(s) is in the rejection  region. We reject  H₀. We dont have enought evidence to support that the cream has effect over the recovery time

Step-by-step explanation:

Sample information:

Size     n = 100

mean   x = 28,5

Population information

μ₀  =  30

Standard deviation  σ   = 8

Test Hypothesis

Null Hypothesis          H₀                x =  μ₀

Alternative Hypothesis   Hₐ           x <  μ₀

We assume CI = 95 %   then α = 5 %    α = 0,05

As the alternative hypothesis suggest we should develop a one tail-test on the left ( we need to find out if the cream have any effect on the rash), effects on the rash could be measured as days of recovery

A z(c) for 0,05 from z-table is:  z(c) = - 1,64

z(s) = ( x - μ₀ ) / σ/√n

z(s) = ( 28,5 - 30 ) / 8/√100

z(s) = - 1,5 * 10 / 8

z(s) =  - 1,875

Comparing z(s)  and z(c)

|z(s)| < |z(c)|        1,875  > 1,64

z(s) is in the rejection  region. We reject  H₀. We dont have enought evidence to support that the cream has effect over the recovery time

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Post a picture to see the example of point C
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Your Daily Sale Goal should be $611.61 to achieve the $18.65k monthly goal 
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