2 years ago

How to add and subtract rational numbers

Mathematics

1 answer:

fenix001 [56]2 years ago

7 0

Before you add or subtract, the rational numbers should have the same bottom number(called a common denominator.)

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Simplify to create a equivalent expression.

Ratling [72]

Answer:

$\boxed{\bold{66k+9}}$

Explanation:

Expand $\bold{5\left(10k+1\right): \ 50k+5}$

= $\bold{50k+5+2\left(2+8k\right)}$

Expand $\bold{2\left(2+8k\right): \ 4+16k}$

= $\bold{50k+5+4+16k}$

Simplify $\bold{50k+5+4+16k: \ 66k+9}$

= $\bold{66k+9}$

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What is the percentage of 204 over 1015, 1 over 8120, 1 over 5832, and 1 over 6?

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Answer:

204/1015 (irreducible) = 20.1%

1/8120 (irreducible) = 0.01232%

1/5832 (irreducible) = 0.01715%

1/6 (irreducible) = 16.67%

Step-by-step explanation:

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2 years ago

Which property is demonstrated?

Korolek [52]

Answer:

Multiplicative Inverse

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Suppose that the function f ( x ) = 2x + 12 represents the cost to rent x movies amonth from an internet movie club. Makayla now

Dafna11 [192]

$x=7\ \ \ \ \Rightarrow\ \ \ f(x)=2\cdot7+12=14+12=26\ [\$]\\\\\$26-\$10= \$16\\\\Ans.\ Makayla\ need\ \ \ \$16.$

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3 years ago

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The perimeter of triangle RXA is 24. If RX = 4 and RA = 11, find XP and PA. A. XP = 1.5, PA = 7.5 B. XP = 2.4, PA = 6.6 C. XP =

mart [117]

The picture in the attached figure

we know that
RX+RA+XA=24
XA=24-RA-RX------> XA=24-11-4----> XA=9
XA=XP+PA
so
XP+PA=9------> XP=9-PA-----> equation 1

RX/XP=RA/PA

11*XP=4*PA-----> equation 2
substitute equation 1 in equation 2
11*[9-PA]=4*PA-----> 99-11*PA=4*PA----> 15*PA=99----> PA=99/15
PA=6.6
XP=9-PA-----> XP=9-6.6----> XP=2.4

the answer is the option
<span>B. XP = 2.4, PA = 6.6 </span>

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2 years ago