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DIA [1.3K]
3 years ago
8

32/a = 12.8/5.6 Pls show work for brainest (Question worth 12 points)

Mathematics
1 answer:
madam [21]3 years ago
4 0

Answer:

a=14

Step-by-step explanation:

32/a=12.8/5.6

a(32/a)=(12.8/5.6)a

32=12.8/5.6a

5.6a(32)=(12.8/5.6a)5.6a

12.8a=179.2 or a = 179.2/12.8

a=14

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What does the following expression mean?<br> 7!<br><br> A. 7+6+5+4+3+2+1<br> B. 7·6·5·4·3·2·1
frez [133]

Answer: B

Step-by-step explanation:

A factorial is multiplying the integer and all of the integers below it together.

3 0
3 years ago
What is the value of the expression 8^−2 ?
muminat
_Brainliest if helped!

1 over 64 

8^2 = 64  , 8^-2 = 1/(8^2)  = 1/64 
7 0
3 years ago
The tables represent two linear functions in a system,
Alenkasestr [34]

Answer:

<h2>(8, -22)</h2>

Step-by-step explanation:

The slope-intercept form of an equation of a line:

y=mx+b

m - slope

b - y-intercept

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

First table:

(-4, 26), (0, 10) → b = 10

m=\dfrac{10-26}{0-(-4)}=\dfrac{-16}{4}=-4

\boxed{y=-4x+10}

Second table:

(-4, 14), (0, 2) → b = 2

m=\dfrac{2-14}{0-(-4)}=\dfrac{-12}{4}=-3

\boxed{y=-3x+2}

We have the system of equations:

\left\{\begin{array}{ccc}y=-4x+10&(1)\\y=-3x+2&(2)\end{array}\right\\\\\text{Put (1) to (2):}\\\\-4x+10=-3x+2\qquad\text{subtract 10 from both sides}\\-4x=-3x-8\qquad\text{add 3x to both sides}\\-x=-8\qquad\text{change the signs}\\x=8\\\\\text{Put the value of x to (2):}\\\\y=-3(8)+2\\y=-24+2\\y=-22

5 0
3 years ago
You start at (-1, 2). You move right 5 units and down 6 units. Where do you end?
Irina-Kira [14]

Answer:

(4,-4)

Step-by-step explanation:

Just plot it or like I did it like this

Since moving right or left is X axis, just add 5 to -1 becuase its ont he X axis

Then for the bottom and up, thats Y so subtract  that to the Y axis so 2-6=-4

4,-4

5 0
3 years ago
Determine an approximate value for y if the coordinate (-0.5387 ,y) is on the unit circle
adoni [48]

Answer:

y = 0.8425   or   y = -0.8425

Step-by-step explanation:

All points in the Cartesian coordinate system have an x and y coordinate, defined by two perpendicular measurements.

If the point is on the unit circle, then the radius of the circle is defined to be 1 unit, and the corresponding right triangle follows the Pythagorean Theorem.

a^2+b^2=c^2

For a unit circle:

x^2+y^2=1^2

Substituting the known value for x, and simplifying...

(-0.5387)^2+y^2=(1)^2

0.29019769+y^2=1

Subtracting 0.29019769 from both sides to begin to isolate "y"...

y^2=1-0.29019769

y^2=0.70980231

Applying the square root property...

\sqrt{y^2}=\pm \sqrt{0.70980231}

y=\pm 0.8424976171...

So, (to 4 decimal places), the y coordinate could be either 0.8425 or -0.8425.

With only the given information, either result is a valid answer.

3 0
2 years ago
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