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3 years ago

Help please I need help with this mathematic question ????

Mathematics

2 answers:

Ivahew [28]3 years ago

7 0

Answer:

Step-by-step explanation:

Not 100 percent sure but if you add the 50 and 62 degrees then you get 112

Yuliya22 [10]3 years ago

4 0

Answer:

112

Step-by-step explanation:

you need to add 50 and 62

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PRACTICE ANOTHER Calculate the standard deviation σ of X for the probability distribution. (Round your answer to two decimal pla

nataly862011 [7]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The standard deviation is $\sigma = 1.17$

Step-by-step explanation:

From the question we are told that

The data is

x 1 2 3 4

P(X = x) 0.2 0.2 0.2 0.4

Generally the standard deviation is mathematically represented as

$\sigma = \sqrt{ \sum x^2 P(x) - (\sum x P(x))^2 }$

Here $x^2 = 1^2 \ \ 2^2 \ \ 3 ^2 \ \ 4^2$

=> $x^2 = 1 \ \ 4 \ \ 9\ 16 \$

$\sum x^2 * P(x) = (1 * 0.2) + (4 * 0.2 ) + (9 * 0.2 ) + (16 * 0.2 )$

$\sum x^2 * P(x) = 9.4$

$\sum x P(x) = (1 *0.2) + (2*0.2) + (3 * 0.2) + (4 * 0.2)$

$\sum x P(x) = 2.8$

$\sigma = \sqrt{ 9.2 - (2.8)^2 }$

$\sigma = 1.17$

6 0

3 years ago

A prescription calls for the following: Sodium citrate 5 g Tartar Emetic 0.015 g Cherry syrup ad 120 mL Using a balance with a s

ella [17]

Answer:

measure the volume of cherry syrup solution with Tartar Emetic = 22.5 mL

Hence, the correct quantity of tartar emetic to fill the prescription will be obtained

Step-by-step explanation:

Given:

Mass of Sodium citrate = 5 g

Mass of Tartar Emetic = 0.015 g = 15 mg

Volume of Cherry syrup ad 120 mL = 120 mL

sensitivity = 4 mg

Error = 5%

Now,

The smallest weight that can be measured = $\frac{\textup{Sensitivity}}{\textup{Error}}\times100$

The smallest weight that can be measured = $\frac{\textup{4}}{\textup{5}}\times100$ = 80 mg

Now,

80 mg is dissolved in 120 mL of Cherry syrup according to prescription

( Thus,

1 mg is dissolved in $\frac{120}{80}\ mL$ of Cherry syrup according to prescription )

so to measure 15 mg of Tartar Emetic, measure the volume of cherry syrup

= $15\times\frac{120}{80}\ mL$

= 22.5 mL

Hence, the correct quantity of tartar emetic to fill the prescription will be obtained

8 0

4 years ago

Find the areas of these polygons

Zigmanuir [339]

The area of triangle
=5*7/2
=35/2
17.5sq.units//

The area of parallelogram
=15*8
=120sq.units//

3 0

2 years ago

Which linear function represents the line given by the point-slope equation y + 7 = –y plus 7 equals negative StartFraction 2 Ov

Citrus2011 [14]

Answer:

Negative Start Fraction 2 Over 3 End Fraction x minus 11

$f(x)=-\frac{2}{3}x-11$

Step-by-step explanation:

we have

$y+7=-\frac{2}{3}(x+6)$

Convert to slope intercept form

$y=mx+b$

Solve for y

That means -----> Isolate the variable y

Distribute in the right side

$y+7=-\frac{2}{3}x-\frac{2}{3}(6)$

$y+7=-\frac{2}{3}x-4$

subtract 7 both sides

$y=-\frac{2}{3}x-4-7$

$y=-\frac{2}{3}x-11$

Convert to function notation

Let

f(x)=y

$f(x)=-\frac{2}{3}x-11$

therefore

The linear function is

Negative Start Fraction 2 Over 3 End Fraction x minus 11

8 0

3 years ago

Read 2 more answers

What is the sum of the polynomials?

scZoUnD [109]

Answer:

Option D

Step-by-step explanation:

(8x^2-9y^2-4x) +(x^2-3y^2-7x)

8x^2+x^2-9y^2-3y^2-4x-7x

9x^2-12y^2-11x

4 0

3 years ago