Mathematics, 01.09.2020 21:01 tamaraquirozmorales

PLEASE HELP! WILL GIVE BRAINLIEST! Macy was asked to compare the two ratios 4:5 and 19 to 30. Her work is shown below. Which is true?

4:5 ? 19 to 30

Four-fifths question mark StartFraction 19 Over 30 EndFraction. Common denominator is 30. StartFraction 18 Over 30 EndFraction less-than StartFraction 19 Over 30 EndFraction
Macy did not correctly write the ratios as fractions.
Macy did not find a common denominator for the fractions.
Macy did not find the correct equivalent fraction with the denominator of 30.
Macy did not correctly compare the numerators.

Answers: 2

Show answers

Answers

Answer from: Quest

That’s what i got when i looked up what the solutions were

Answer from: Quest

x= 1

step-by-step explanation: convert 5\frac{11}{12}5

to improper fraction. use this rule: a \frac{b}{c}=\frac{ac+b}{c}a

ac+b

3.25+0.5x+1\frac{1}{3}+\frac{5}{6}x=\frac{5\times 12+11}{12}3.25+0.5x+1

5×12+11

2 simplify 5\times 125×12 to 6060

3.25+0.5x+1\frac{1}{3}+\frac{5}{6}x=\frac{60+11}{12}3.25+0.5x+1

60+11

3 simplify 60+1160+11 to 7171

3.25+0.5x+1\frac{1}{3}+\frac{5}{6}x=\frac{71}{12}3.25+0.5x+1

4 simplify \frac{5}{6}x

x to \frac{5x}{6}

3.25+0.5x+1\frac{1}{3}+\frac{5x}{6}=\frac{71}{12}3.25+0.5x+1

5 convert 1\frac{1}{3}1

to improper fraction. use this rule: a \frac{b}{c}=\frac{ac+b}{c}a

ac+b

3.25+0.5x+\frac{1\times 3+1}{3}+\frac{5x}{6}=\frac{71}{12}3.25+0.5x+

1×3+1

6 simplify 1\times 31×3 to 33

3.25+0.5x+\frac{3+1}{3}+\frac{5x}{6}=\frac{71}{12}3.25+0.5x+

3+1

7 simplify 3+13+1 to 44

3.25+0.5x+\frac{4}{3}+\frac{5x}{6}=\frac{71}{12}3.25+0.5x+

8 simplify 3.25+0.5x+\frac{4}{3}+\frac{5x}{6}3.25+0.5x+

to \frac{13.75}{3}+\frac{4x}{3}

13.75

\frac{13.75}{3}+\frac{4x}{3}=\frac{71}{12}

13.75

9 simplify \frac{13.75}{3}

13.75

to 4.5833334.583333

4.583333+\frac{4x}{3}=\frac{71}{12}4.583333+

10 subtract 4.5833334.583333 from both sides

\frac{4x}{3}=\frac{71}{12}-4.583333

−4.583333

11 simplify \frac{71}{12}-4.583333

−4.583333 to \frac{4}{3}

\frac{4x}{3}=\frac{4}{3}

12 multiply both sides by 33

4x=\frac{4}{3}\times 34x=

×3

13 simplify \frac{4}{3}\times 3

×3 to \frac{12}{3}

4x=\frac{12}{3}4x=

14 simplify \frac{12}{3}

to 44

4x=44x=4

15 divide both sides by 44

x=1

Answer from: Quest

$3^{4x-5}=\left(\dfrac{1}{27}\right)^{2x+10}\\\\3^{4x-5}=\left(\dfrac{1}{3^3}\right)^{2x+10}\qquad\text{use}\ a^{-n}=\dfrac{1}{a^n}\\\\3^{4x-5}=\left(3^{-3}\right)^{2x+10}\qquad\text{use}\ (a^n)^m=a^{n\cdot m}\\\\3^{4x-5}=3^{-3(2x+10)}\qquad\text{use distributive property}\\\\3^{4x-5}=3^{(-3)(2x)+(-3)(10)}\\\\3^{4x-5}=3^{-6x-30}\iff4x-5=-6x-30\qquad\text{add 5 to both sides}\\\\4x=-6x-25\qquad\text{add 6x to both sides}\\\\10x=-25\qquad\text{divide both sides by 10}\\\\\boxed{x=-2.5}$

Answer from: Quest

answer:

at time x=0 we have 1000, at time x=1 we have 2000, at time x=2 we have 4000.

so that's an initial value of 1000 and a ratio of 2,

y = 1000 (2^x)

hope this !

Another question on Mathematics

Mathematics, 21.06.2019 18:50

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Answers: 1

Answer

Mathematics, 21.06.2019 18:50

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15

Answers: 1

Answer

Mathematics, 21.06.2019 19:40

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

Answers: 1

Answer

Mathematics, 21.06.2019 21:00

5x−4≥12 or 12x+5≤−4 can you with this problem

Answers: 3

Answer

You know the right answer?

PLEASE HELP! WILL GIVE BRAINLIEST! Macy was asked to compare the two ratios 4:5 and 19 to 30. Her w...