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3 years ago

Fractions 2 3/4 + 4 4/5 + 3 8/9 =

Mathematics

2 answers:

zysi [14]3 years ago

7 0

2 3/4 + 4 4/5 + 3 8/9 =

= (2x4+3)/4 + (4x5+4)/5 + (3x9+8)/9

= ⁴⁵⁾11/4 + ³⁶⁾24/5 + ²⁰⁾35/9

= (495 + 864 + 700)/180

= 2059/180

iragen [17]3 years ago

6 0

Answer:

11 79/80

Step-by-step explanation:

2+4+3+ 3/4+4/5+8/9

=9+ 3(5*9) +4(4*9) + 8(5*4)/4*5*9

=9 + 135+ 144+160/180

=9+ 439/180

=9+2 + 79/80

=11 79/80

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NemiM [27]

Answer:

x = 8

z = 65

Step-by-step explanation:

Through various rules, we are able to assert: (6x + 67)° = 115°.

Now, we want to solve for x:

6x + 67 = 115

6x = 48

x = 8

We know that z° is equal to the complement of (6x + 67)°, and together these must sum to 180°. Therefore, we can simply take 180° - 115° to find that z° = 65°.

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2 years ago

Which of the following expressions is a factor of the polynomial x 2 +3/2x-1

Elodia [21]

Answer:

$\large \boxed{\sf \ \ \ (x+2)(x-\dfrac{1}{2}) \ \ \ }$

Step-by-step explanation:

Hello,

let's solve

$x^2+\dfrac{3}{2}x-1=0\\\\ 2x^2+3x-2=0 \ \text{multiply by 2}\\\\\\$

$\Delta=b^2-4ac=9+4*2*2=9+16=25$

There are two solutions

$x_1=\dfrac{-3-\sqrt{25}}{4}\\\\x_1=\dfrac{-3-5}{4}\\\\x_1=\dfrac{-8}{4}\\\\\boxed{x_1=-2}$

And

$x_2=\dfrac{-3+\sqrt{25}}{4}\\\\x_2=\dfrac{-3+5}{4}\\\\x_2=\dfrac{2}{4}\\\\\boxed{x_2=\dfrac{1}{2}}$

So we can write

$x^2+\dfrac{3}{2}x-1\\\\=(x-x_1)(x-x_2)\\\\=(x+2)(x-\dfrac{1}{2})$

Hope this helps.

Do not hesitate if you need further explanation.

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5 0

3 years ago

Jackson pays $18 per month for his phone service, plus $0.07 for each long distance minute used. Which of the following correctl

Ksenya-84 [330]

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4 0

3 years ago

Read 2 more answers

Instructions: Find the missing length indicated.

ikadub [295]

Answer:

X = 25

Step-by-step explanation:

Set up as a ratio:

Simplify ratio, multiply by 5, divide by 12

$\frac{60}{144} = \frac{x}{60} \\\frac{5}{12}=\frac{x}{60} \\ 300 = 12x\\12x=300\\x=25$

4 0

3 years ago

Please help, thank you.

AlekseyPX

We need the radius to find the surface area. Since we have the circumference we can use that to find the radius.

C = 2πr
23 = 2(3.14)r
23 = 6.28r
23/6.28 = r
3.66 = r

Now use the radius to find the surface area.

SA = 4πr²
SA = 4(3.14)(3.66)²
SA = 168.33

Surface area is C. 168 cm²

Hope this helps :)

8 0

3 years ago