2 years ago

The equation sin (40 degree) equals StartFraction b Over 20 EndFraction can be used to determine the length of line segment AC.

Mathematics

1 answer:

Mars2501 [29]2 years ago

4 0

Answer:

B. 12.9cm

Step-by-step explanation:

I presume we are asked to find the length of b

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How many gallons of pure alcohol should be added to 40 gallons of a 20% solution so

Rudik [331]

Answer:

8/3

Step-by-step explanation:

i put equations as this:

x+40 = y

where x is galllons of pure mixture and y is the gallons of the new mixture

the other equation i id was:

x+0.2(40) = 0.25y

x+8 = 0.25y

y = 4x+32

solve using substitution

(x+40) = 4x+32

x = 4x-8

-3x = -8

x = 8/3

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3 years ago

What is the cubed root of 27?

lianna [129]

Answer:

Then answer is 3

Step-by-step explanation:

cube root = ³√27

3×3×3 = 3³ = 27

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2 years ago

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The top of a coffee table is the shape of a rectangle the length of the top of the coffee table is 3.5 feet in the area is 10.5

velikii [3]

Area=length times width

area=10.5
length=3.5

10.5=3.5 times width
divide both sides by 3.5
3=width
width=3ft

3 0

2 years ago

I need help on math on how to solve a linear equation. So how do you solve (x-2)+(2x+5).

saveliy_v [14]

So, put your "x's" together first and then your intercepts. That should answer your question :)

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2 years ago

Question 3 of 10

Bas_tet [7]

Answer:

A. $y-5=1.5(x-4)$ .

B. $y=1.5x-1$ .

Step-by-step explanation:

The given line passes through (2,2) and (4,5).

The slope the given line can be found using the formula;

$m=\frac{y_2-y_1}{x_2-x_1}$

$m=\frac{5-2}{4-2}$

This gives $m=\frac{3}{2}=1.5$ .

The slope-intercept form is $y-y_1=m(x-x_1)$ .

We substitute the second point to get:

$y-5=1.5(x-4)$ .

We expand to get:

$y-5=1.5x-6$ .

$y=1.5x-6+5$ .

$y=1.5x-1$ .

4 0

2 years ago