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4 years ago

Solve for t 3t-15 < -3 and -4t < 12

Mathematics

1 answer:

I am Lyosha [343]4 years ago

7 0

solution

-4t < 12 3t-15<-3

-4 -4 3t<-3+15

t>-3 3t<12

3 3

t<4

therefore the numbers that makes both equations right is -3<t<4

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The mean and standard deviation of a normal distribution are 150 and 12 respectively. What percentage of values lie between:

Semenov [28]

Answer:

Step-by-step explanation:

Use a calculator with built-in statistical functions. The function applying here is normcdf(, the "cumulative density function."

(a) The percentage of values lying between 138 and 162 is

norm(138,162, 150, 12), which comes out to 0.683, or 68.3%.

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4 years ago

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If product means to multiply than
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4 years ago

Is compound interest always greater than simple interest ?Give examples

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3 years ago

Simplify by combining like terms: 3x + 2 + x + 7

velikii [3]

4x +9

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3 years ago

Only questions 10-12!! Help please!!

butalik [34]

Answer:

Step-by-step explanation:

10) The opposite sides of a parallelogram are equal. It means that

a + 15 = 3a + 11

3a - a = 15 - 11

2a = 4

a = 4/2 = 2

Also,

3b + 5 = b + 11

3b - b = 11 - 5

2b = 4

b = 4/2 = 2

11) The opposite angles of a parallelogram are congruent and the adjacent angles are supplementary. This means that

2x + 11 + x - 5 = 180

3x + 6 = 180

3x = 180 - 6 = 174

x = 174/3 = 58

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2y = 10

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Also,

z + 9 = 2z + 7

2z - z = 9 - 7

z = 2

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3 years ago