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3 years ago

3.5 x + 4 + 2.7 xHow do I solve

Mathematics

1 answer:

elixir [45]3 years ago

7 0

Answer:

3.5x+6.7

Step-by-step explanation:

simplify step-by-step.

3.5x+4+2.7

Combine Like Terms:

=3.5x+4+2.7

=(3.5x)+(4+2.7)

=3.5x+6.7

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Convert 210° to raidians

Over [174]

Answer:

3.66519

Step-by-step explanation:

Converting between degrees and radians is pretty easy. To convert radians to degrees, multiply by 180° and divide by ∏. To convert degrees to radians, divide by 180° and multiply by ∏.

3 0

3 years ago

Suppose Clay, a grocery store owner, is monitoring the rate at which customers enter his store. After watching customers enter f

Kitty [74]

Answer:

70th percentile for the amount of time between customers entering is 30.10

Step-by-step explanation:

given data

mean = 25

to find out

What is the 70th percentile for the amount of time between customers entering Clay's store

solution

we know that here mean is

mean = $\frac{1}{\lambda}$ ..................1

so here 25 = $\frac{1}{\lambda}$

and we consider time value corresponding to 70th percentile = x

so we can say

P(X < x) = 1 - $e^{- \lambda *x}$

P(X < x) = 70 %

1 - $e^{\frac{-x}{25}}$ = 70 %

1 - $e^{\frac{-x}{25} }$ = 0.70

$e^{\frac{- x}{25} }$ = 0.30

take ln both side

$\frac{-x}{25}$ = ln 0.30

$\frac{x}{25}$ = 1.203973

x = 30.10

70th percentile for the amount of time between customers entering is 30.10

3 0

3 years ago

Identify the interval(s) on which the function y = 2x^2 - 8x - 10 is positive.

Serga [27]

Given:

$y=2x^2-8x-10$

To find:

The interval(s) on which the given function is positive.

Solution:

We have,

$y=2x^2-8x-10$

$y=2(x^2-4x-5)$

$y=2(x^2-5x+x-5)$

$y=2(x(x-5)+1(x-5))$

$y=2(x+1)(x-5)$

For zeroes, $y=0$

$2(x+1)(x-5)=0$

$x=-1,x=5$

-1 and 5 divide the number line in three parts $(-\infty , -1),(-1,5),(5,\infty )$ .

Interval Selected Value $y=2(x+1)(x-5)$ Sign

$(-\infty,-1)$ -2 $y=2(-2+1)(-2-5)=14$ +

$(-1,5)$ 0 $y=2(0+1)(0-5)=-10$ -

$(5,\infty)$ 6 $y=2(6+1)(6-5)=14$ +

So, the function is positive for interval $(-\infty,-1)$ and $(5,\infty)$ .

We can say that the function is positive for interval x < -1 and x > 5.

Therefore, the correct option is B.

8 0

3 years ago

Three friends split the cost of a pizza and a salad. The pizza cost$15 and the salad cost $6. Which expression can you use to fi

zubka84 [21]

Since there are 3 people, you divide the total cost by 3.
The expression is (15+6)/3 or 21/3 or 7.

6 0

3 years ago

Read 2 more answers

Please help!! A box contains 7 yellow, 5 blue, and 4 red balls. Three balls are drawn at random. What is the probability that ex

My name is Ann [436]

Answer:

7/16 or (if you are looking for a word) likely

Step-by-step explanation:

3 0

3 years ago

3.5 x + 4 + 2.7 xHow do I solve​

3.5 x + 4 + 2.7 xHow do I solve