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3 years ago

Please help it’s urgent and need this done

Mathematics

1 answer:

WARRIOR [948]3 years ago

7 0

Answer:

x² - x - 2

Step-by-step explanation:

Since the curve cuts the x-axis at x = -1 and 2. The factors will be x+1 and x-2

Taking the product of the factors

f(x) = (x+1)(x-2)

f(x) = x² - 2x + x - 2

f(x) = x² - x - 2

Hence the required function is x² - x - 2

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Solve: 0.2c + 0.69 = 1.37 c = _____

iVinArrow [24]

Answer:

c = 3.4. I hope this is the answer:)

5 0

3 years ago

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

Delvig [45]

Answer:

<em>0.75</em><em> liters of 5% hydrochloric acid solution </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.

4 0

3 years ago

Any help would be greatly appreciated

harkovskaia [24]

Answer:

<h2>the first ordered pair is (-2, -2)</h2><h2>the second ordered pair is (4,0)</h2>

Step-by-step explanation:

to find the missing values, plug in the given values into the equation:

x-3y=4

the first ordered pair:

we are given a y-value (-2), so lets plug it into the equation:

x-3*(-2)=4

now solve for the missing value:

x+6=4

x=4-6

x=-2

now plug in both x and y and check if the equation is true:

(-2)-3*(-2)=4

-2+6=4

6-2=4

4=4

the first ordered pair is (-2, -2)

the second ordered pair:

we are given a x-value (4), so lets plug it into the equation:

(4)-3y=4

now solve for the missing value:

-3y=4-4

-3y=0

y=0/-3

y=0

now plug in both x and y and check if the equation is true:

(4)-3*(0)=4

4-0=4

4=4

the second ordered pair is (4,0)

8 0

3 years ago

A market trader has 100 oranges for sale, 4 of them are unripe, what is the

Yuliya22 [10]

Answer: 24/25

Explanation:

100/100 - 4/100 = 96/100 = 24/25

4 0

2 years ago

Read 2 more answers

express the numbers eight, fifteen and seventeen in base 2. I have forgotten how to do the base 2 question.

saw5 [17]

The quickest way for converting small numbers like this to binary would probably be to find the closest power of 2, then add/subtract intermediate powers of 2 as needed.

Converting 8 is immediate, since it's already a power of 2:

$8=2^3\implies 8_{10}=1000_2$

Converting 15 and 17 is also pretty easy if you're familiar with the rules of arithmetic in binary.

$15=16-1=2^4-2^0\implies 15_{10}=16_{10}-1_{10}=10000_2-1_2=1111_2$

$17=16+1=2^4+2^0\implies 17_{10}=10000_2+1_2=10001_2$

6 0

3 years ago