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yawa3891 [41]
3 years ago
6

Which expression is equivalent to 3 (4x - 5)?

Mathematics
1 answer:
Rufina [12.5K]3 years ago
6 0
The answer is D 12x-15
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In a right triangle, one of the legs is 5 cm smaller than the hypotenuse, and the other leg is 10 cm smaller than the hypotenuse
nata0808 [166]

Answer:

25 cm.

Step-by-step explanation:

If the hypotenuse is  x cm long the 2 legs are  x-5 and x-10 cm long.

So by the Pythagoras theorem:

x^2 = (x - 5)^2 + (x - 10)^2

x^2 = x^2 - 10x + 25 + x^2 - 20x + 100

x^2 - 30x + 125 = 0

(x - 5)(x - 25) = 0

x = 5, 25

We can discard x = 5 because that would make the lengths of the legs negative so the hypotenuse = 25 cm long.

3 0
3 years ago
For what value of b in the equation (2z + b)(z − 3) = 0 will a solution for z be −4?
bazaltina [42]
( - 8 +  b )( - 4 - 3 ) =  0;
( - 8 + b )( - 7 ) = 0 ;
-8 + b = 0;
b = 8.
7 0
3 years ago
ASAP please help me I need this quick <br> The question and answers are in the picture
kati45 [8]

Answer:

5

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
A triangle in the coordinate plane has vertices ????(0,10), ????(−8,8), and ????(−3,5). Is it a right triangle? If so, at which
GaryK [48]

Answer:

It is a right triangle, the right angle is at the point (-3, 5)

Step-by-step explanation:

The first step is to locate the points of the vertices in a plane, in this case they are (0.10), (-8.8) and (-3.5). The desmostration of this is shown in the attached image.

As we can see it is formed a right triangle (the figure outlined in red), and the rigth angle is the one at the point (-3,5).

5 0
3 years ago
Please someone help me answer this!!
jekas [21]

Answer:

a^10

Step-by-step explanation:

5*2=10

3 0
3 years ago
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