3 years ago

Which expression is equal to -1?

Mathematics

2 answers:

Andru [333]3 years ago

8 0

The second one is correct I have the same question jk

Stolb23 [73]3 years ago

4 0

Answer:

c or the 3d one

Step-by-step explanation:

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5l of 70% alcohol solution was mixed with 9l of pure water what is the concentration of the mixture

ElenaW [278]

The new mixture has a total volume of 5 L + 9 L = 14 L.

70% of the 5 L alcohol solution is alcohol, so that it contributed 3.5 L of alcohol to the mixture. The pure water contributed no alcohol. So in the mixture, the concentration of alcohol is

3.5 L / 14 L = 0.25, or 25%

6 0

3 years ago

What is the midpoint of np if N(10, -14) and P(-16, -4)?

Virty [35]

Answer:

<h3>Midpoint = (-3 ,-9)</h3>

Step-by-step explanation:

$\\Midpoint =\left(\frac{x_2+x_1}{2},\:\:\frac{y_2+y_1}{2}\right)\\\\\left(x_1,\:y_1\right)=\left(10,\:-14\right),\:\\\left(x_2,\:y_2\right)=\left(-16,\:-4\right)\\\\=\left(\frac{-16+10}{2},\:\frac{-4-14}{2}\right)\\\\=(\frac{-6}{2}, \frac{-18}{2}\\ \\Simplify\\\\=\left(-3,\:-9\right)$

3 0

3 years ago

I’ll give who ever 55 points just help plz

svp [43]

Answer:

it should be 3.0

Step-by-step explanation:

I hope this helps:) :)

5 0

3 years ago

What is the area of a 5x5x5 cube(includng inside)?

myrzilka [38]

Answer:

the face area would be 25.0

and total area would be 150.0

Step-by-step explanation:

5.0*5.0=25.0

6*25.0=150

3 0

3 years ago

Which of the following transformations would result in two congruent triangles?

VARVARA [1.3K]

Answer:

Step-by-step explanation:

I just did it in illuminate

4 0

3 years ago