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xxMikexx [17]
3 years ago
15

In chemistry class 18 liters of 30% alcohol solution must be mixed with 20% solution to get 14% solution how many liters of 20%

solution are needed?
Mathematics
1 answer:
alexdok [17]3 years ago
5 0
If you are mixing a 30% solution with a 20% solution to obtain a 14% solution, you will never obtain a 14% solution.

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Blank of 100 equals 16%
xxMikexx [17]
If you would like to solve blank of 100 equals 16%, you can calculate this using the following steps:

x of 100 equals 16%
x * 100 = 16%
x * 100 = 16/100      /100
x = 16/100 / 100
x = 0.0016

The correct result would be: 0.0016 of 100 equals 16%.
6 0
3 years ago
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Rex's puppy is 5 years younger than his other dog. If the other dog is x years old, what is an expression for the puppy's age?
HACTEHA [7]
The other dog's age is "x". Rex's puppy is 5 years less than "x". SO...
x-5.

Understand?
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3 years ago
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T models the temperature (in degrees Celsius) in New York City when it's t hours after midnight on a given day. Match each state
Klio2033 [76]

Answer:

Please check explanation

Step-by-step explanation:

Here, we want to do a matching.

We shall be matching the given statements with the features we have on the graph

Hence we shall be looking closely at the graph to answer the questions.

The y-intercept is the point at which the graph touches the y-axis

And it was at -3 degrees celsius at the beginning of the day.

The temperature was above zero between 8am and 8pm. The matching statement is that it is increasing or decreasing interval

We can see that the graph rose from 8am before it finally comes to zero at 8pm

Positive or negative interval matches with it was getting warmer between 2am and 2pm.

While temperature was lowest at 2am, we can see a peak at 2pm.

8 0
3 years ago
(4,2) graph the vertex
ipn [44]

Answer:

To plot (4,2) start at the origin (0,0) and move right 4 units and up 2 units (4,2)

3 0
3 years ago
What is the surface area of the rectangular pyramid
posledela

Answer:

<h2>41.74 m²</h2>

Step-by-step explanation:

We have:

rectangle 4.8 m × 3.8 m

two triangles with base b = 4.8 m and height h = 2.6 m

two triangle with base b = 3.8 m and height h = 2.9 m.

The formula of an area of a rectangle l × w:

A = lw

Substitute:

A_1 = (4.8)(3.8) = 18.24\ m^2

The formula of an area of a triangle:

A=\dfrac{bh}{2}

Substitute:

A_2=\dfrac{(4.8)(2.6)}{2}=6.24\ m^2\\\\A_3=\dfrac{(3.8)(2.9)}{2}=5.51\ m^2

The Surface Area:

S.A.=A_1+2A_2+2A_3\\\\S.A.=18.24+2(6.24)+2(5.51)=41.74\ m^2

3 0
3 years ago
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