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inysia [295]
3 years ago
6

Find z for the following proportion: z/9= 2/3

Mathematics
1 answer:
serg [7]3 years ago
4 0
Cross multiplication will help find the value of x 
\frac{z}{9} = \frac{2}{3} 



9*2=18 
3*z=3z 

Now we have :
3z=18 
Divide both sides by 3 to isolate z 

Final answer: z=6
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Brad says that if a second number is 125% of the first number, then the first number must be 75% of the second number. Is he cor
olga55 [171]

Answer: He is not correct.

Steps:

Let x1 and x2 be the first and second number, respectively.

x_2 = \frac{5}{4}x_1\\\frac{4}{5}x_2 =x_1

In words, if the second is 125%, or 5/4 of the first number (first equation),

then the first is 4/5 of the second, which is 0.8 or 80%.

8 0
2 years ago
Help me please I need to do my unit testtt
Luda [366]

Answer:

B.

Step-by-step explanation:

Although the numbers given are negative, we can see that by the lines surrounding them, it is asking for their absolute value. Since absolute values are always positive, the correct answer would be B.

5 0
2 years ago
the equation of the line a is given as y = -3/4 x -2. Suppose the line a is parallel to line b and lime t is perpendicular to li
Burka [1]

Answer: The equation for line b is y = -\frac{3}{4}x  + 5

The equation for line t is y= \frac{4}{3} x+5

The attachment shows the original line in green, the parallel line b in red, and the perpendicular line t in blue.

Step-by-step explanation: Use slope intercept form, y = mx + b

The given coordinate, (0,5) is on the y-axis, so  5 will be the y-intercept of the equation. Keep the slope of the original equation and substitute the new value for "b"  

To write the equation for line t

Both lines share the y-intercept, (0,5) so the "b" term will be the same. The slope of a perpendicular line is the reciprocal of the original slope with the opposite sign.

So invert 3/4 to become 4/3 and change the negative sign to positive.

The resulting equation is y = 4x/3 + 5

3 0
3 years ago
Complete the ratio table below
adelina 88 [10]
The answer for 4 is 12..
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7 0
3 years ago
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snow_lady [41]

Answer:

True

Step-by-step explanation:

7 0
2 years ago
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