Solve -0.5(–2x+8) – 8 = 8.

Mathematics

2 answers:

Arlecino [84]3 years ago

3 0

Answer:

x = 20

Step-by-step explanation:

Firstly, we have to distribute: (-0.5 * -2x) and (-0.5 * 8) -8 = 8

1x - 4 - 8 = 8

Next collect like terms: 1x - 12 = 8

Isolate x to get the value of x: Add 12 to both sides

1x = 20

So x = 20

Alla [95]3 years ago

3 0

Answer:x=20

Step-by-step explanation: first you distribute the value outside of the parentheses

-0.5*2x= 1x

-0.5*8=-4

it then becomes

x-4-8=8

combine -4 and -8

x-12=8

add the 12 over

x=20

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The researcher trains a sample of 16 individuals in mindfulness and then collects data on how long they spend eating per day. Th

Mila [183]

Answer:

The calculated t-value is t=0.47.

Step-by-step explanation:

<em>The question is incomplete:</em>

<em>"Americans typically eat quickly and do not spend time enjoying their meal. A researcher plans to test if those trained in mindfulness will take more time to enjoy their meal (that is, they will spend more time eating than the general population). The general population spends an average of 68 minutes per day combined eating their three meals. The researcher trains a sample of 16 individuals in mindfulness and then collects data on how long they spend eating per day. The sample mean for those trained in mindfulness equals 74; the SS = 150. What is the calculated t-value? Round your answer to two decimal places."</em>

The degrees of freedom are (n-1)=(16-1)=15

The standard deviation is:

$s=\sqrt{\frac{SS}{n-1}}=\sqrt{\frac{150}{16-1}}=\sqrt{10}=3.16$