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3 years ago

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Niech ktoś pomoże ! a)5 2\7 +1 3\7 -1\7= b)4 5\9 -2 4\9 +3 2\9= c)2 2\3 -(1 4\9 +2 3\9=

1 answer:

kvv77 [185]3 years ago

5 0

A) 6 4/7

B) 5 3/9

C) 6 6/3

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Tell whether the given number is a solution of each question. ( Must show work for credit)

guajiro [1.7K]

Answer/Step-by-step explanation:

1. $9 = 2a + 3$ ; 3

Let's solve for a.

$9 - 3 = 2a$ (subtraction property of equality)

$6 = 2a$

$\frac{6}{2} = a$ (division property of equality)

$3 = a$

$a = 3$

Therefore, 3 is a solution to 9 = 2a + 3

2. $5n - (-30) = 5$ ; 7

$5n + 30 = 5$ (- × - = +)

$5n = 5 - 30$ (Subtraction property of equality)

$5n = -25$

$\frac{5n}{5} = \frac{-25}{5}$ (division property of equality)

$n = -5$

Therefore, 7 is not a solution of $5n - (-30) = 5$

3. $4.4r - 2.8 = 1.6$ ; 1

$4.4r = 1.6 + 2.8$

$4.4r = 4.4$

$\frac{4.4r}{4.4} = \frac{4.4}{4.4}$

$r = 1$

Therefore, 1 is a solution of $4.4r - 2.8 = 1.6$ .

5 0

3 years ago

How am I supposed to integrate this?

svlad2 [7]

$6x^2-4x+1=6\left(x-\dfrac13\right)^2+\dfrac13\ge0$

which means the parabola lies above the x-axis over its entire domain. This means the area is given by

$\displaystyle\int_{-1}^2(6x^2-4x+1)\,\mathrm dx=2x^3-x^2+x\bigg|_{x=-1}^{x=2}=10-(-5)=15$

4 0

3 years ago

Pls answer bb I give extra pp-oints (::

DENIUS [597]

Answer:let me know please

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

If s = -5 and t = 3, find the value of s 2 t.<br><br> 225<br> 75<br> 30<br> -75

Reika [66]

Just answered this one a few minutes ago.

(-5)(-5)(3)= 75

7 0

3 years ago

Read 2 more answers

Create a equation where the solution is x= -5

Illusion [34]

x + 3 = 8

OR

4x - 4 = 16

hope this helps!

5 0

2 years ago