3 years ago

Find the value of this expression if x = 7 and y= -2 xy^2/9

Mathematics

2 answers:

jeka943 years ago

5 0

7(−2)^2 /9

= 28 /9

tresset_1 [31]3 years ago

4 0

the answer above this is wrong if you’re using Plato

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Pavel [41]

:)

x+x+55+x+38=180

3x+93=180

3x=87

x=29°

8 0

3 years ago

Tom needs to order some hamburgers for his colleagues from

Tanzania [10]

Answer:

10 hamburgers

Step-by-step explanation:

$2.00 x 10 = $20.00

$20.00 + $5.00 = $25.00

3 0

3 years ago

Read 2 more answers

A botanist wishes to estimate the typical number of seeds for a certain fruit. She samples 72 specimens and counts the number of

Oliga [24]

Answer:

99% Confidence interval: (50.9,61.3)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = 56.1

Sample size, n = 72

Alpha, α = 0.01

Sample standard deviation, σ = 16.7

Degree of freedom = n - 1 = 71

99% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 71 and}~\alpha_{0.01} = \pm 2.64$

$56.1 \pm 2.64(\dfrac{16.7}{\sqrt{72}} ) \\\\= 56.1 \pm 5.19\\\\ = (50.91 ,61.29)\approx (50.9,61.3)$

8 0

3 years ago

Please help with this

xenn [34]

Answer:

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

What is the equation of a line that is perpendicular to -x + 2y =4 and passes through the point (-2, 1)

Trava [24]

Answer:

y = -2x - 3

Step-by-step explanation:

-solve for y: y = 1/2x + 2

-perpendicular equals opposite slope: -2

-plug in the point: (1) = -2(-2) + b

1 = 4 + b

b = -3

put it all together: y = -2x - 3

8 0

3 years ago