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Darya [45]
3 years ago
14

Zero of the polynomial p (x) =3x +4 is​

Mathematics
1 answer:
Nimfa-mama [501]3 years ago
6 0

Answer:

4

Step-by-step explanation:

Substitute by 0 in the function

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Rajan needs 1 liter of 15% hydrochloric acid solution for an experiment. He checks his storage cabinet, but he only has a 5-lite
yarga [219]

Answer:

<em>Rajan must use </em><em>0.75</em><em> liters of 5% hydrochloric acid solution and </em><em>0.25</em><em> liters of 45% hydrochloric acid solution.</em>

Step-by-step explanation:

Let us assume that, x liters of the 5% hydrochloric acid and y liters of the 45% hydrochloric acid solutions are combined.

As Rajan need total of 1 liter of solution, so

x+y=1

i.e x=1-y --------------------1

As Rajan needs 5% hydrochloric acid and 45% hydrochloric acid to make a 1 liter batch of 15% hydrochloric acid, hence acid content of the mixture of two acids will be same as of the final one, so

0.05x+0.45y=1\times 0.15

i.e 5x+45y=15 -------------2

Putting value of x from equation 1 in equation 2,

\Rightarrow 5(1-y)+45y=15

\Rightarrow 5-5y+45y=15

\Rightarrow 5+40y=15

\Rightarrow 40y=15-5=10

\Rightarrow y=0.25

Putting the value of y in equation 1,

x=1-0.25=0.75

Therefore, Rajan must use 0.75 liters of 5% hydrochloric acid solution and 0.25 liters of 45% hydrochloric acid solution.

5 0
3 years ago
-4x+6y=-7<br> -13x-2y=-4 <br> Elimination or substitution
12345 [234]

Answer:

substitution

Step-by-step explanation:

7 0
3 years ago
Nolan begins a savings account with $100 at 2% interest according to the equation , where Vn is the value of his account after x
AleksAgata [21]
$94.23...............
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Find the difference between (-11,-11) and (-12,-8) round answer to the nearest hundredth
lisov135 [29]

Answer:

Step-by-step explanation:

The two points can be made into a right triangle with the two sides defined by   two lines drawn from the two given points.  Use the Pythagorean Theorem to solve for the hypotenuse, the distance between the two points.  See attached graph.

6^2 + 2^2 = x^2

36 + 4 = x^2

x^2 = 40

x = 6.32

3 0
3 years ago
Sue has 18 sweets.
Norma-Jean [14]
Easy:

((18-x) -5) + ((18+x)➗2)
7 0
3 years ago
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