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3 years ago

What is 5 4/9 take away 1 7/9

Mathematics

1 answer:

Dennis_Churaev [7]3 years ago

4 0

The answer is to the question should be 3.6

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Use completing the square to solve for x in the equation (x-12)(x+4)= 9.

iragen [17]

Answer:

x = 4 + sqrt(73) or x = 4 - sqrt(73)

Step-by-step explanation by completing the square:

Solve for x:

(x - 12) (x + 4) = 9

Expand out terms of the left hand side:

x^2 - 8 x - 48 = 9

Add 48 to both sides:

x^2 - 8 x = 57

Add 16 to both sides:

x^2 - 8 x + 16 = 73

Write the left hand side as a square:

(x - 4)^2 = 73

Take the square root of both sides:

x - 4 = sqrt(73) or x - 4 = -sqrt(73)

Add 4 to both sides:

x = 4 + sqrt(73) or x - 4 = -sqrt(73)

Add 4 to both sides:

Answer: x = 4 + sqrt(73) or x = 4 - sqrt(73)

4 0

3 years ago

Please help me points and brainliest

mrs_skeptik [129]

Answer:

1/2

Step-by-step explanation:

slope = $\frac{rise}{run}$ = $\frac{2}{4}$ = $\frac{1}{2}$

$\frac{2}{4}$ = $\frac{3}{6}$ Same ratio. Both reduce to $\frac{1}{2}$

5 0

3 years ago

2) Brian purchased pens for 75 cents each and pencils for 40 cents each he bought total of 22 writing utensils for $11.95. How m

d1i1m1o1n [39]

Answer:

13 pencils.

Step-by-step explanation:

Let x be the pens and y be the pencils

Given:

Brian purchased pens for 75 cents each and pencils for 40 cents each he bought total of 22 writing utensils for $11.95.

Total pens and pencils is 22

So, $x+y=22$ ----------------(1)

And he bought all utensils for $11.95. and each pen for 75 cents and pencils for 40 cents.

$0.75x+0.40y=11.95$ ------------(2)

solve equation 1 and equation 2 for x and y.

From equation 1.

$x+y=22$

$y=22-x$ ----------------(3)

put y value in equation 2.

$0.75x+0.4(22-x)=11.95$

$0.75x+0.4\times 22-0.4x=11.95$

$0.75x+8.8-0.4x=11.95$

$0.75x-0.4x=11.95-8.8$

$0.35x=3.15$

$x=\frac{3.15}{0.35}$

$x=9$

Now substitute x value in equation 3.

$y=22-9$

$y=13$

So, he buy 13 pencils.

5 0

3 years ago

Simplify 14 + 13 − (12 + 11). A) 0 B) 1 C) 4 D) 10

never [62]

C. 4
14 + 13 - (23)
27 - 23
4

4 0

3 years ago

Read 2 more answers

Question 3(Multiple Choice Worth 4 points) (05.05)The width of a rectangle is shown below: A coordinate plane with a point A at

olganol [36]

D 4/147
FTC +65-/325
Junk. 5(-4)

8 0

3 years ago