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stellarik [79]
3 years ago
12

Which group represents equivalent ratios?

Mathematics
1 answer:
ladessa [460]3 years ago
3 0

Answer:

20%, 1/5, 0.2

Step-by-step explanation:

<u><em>Verify each case</em></u>

case 1) we have

20%, 1/4, 0.2

we know that

20\%=20/100=0.20

\frac{1}{4}=0.25

therefore

0.20=0.20\neq0.25

This group not represents equivalent ratios

case 2) we have

25%, 1/4, 0.2

we know that

25\%=25/100=0.25

\frac{1}{4}=0.25

therefore

0.25=0.25\neq0.20

This group not represents equivalent ratios

case 3) we have

20%, 1/5, 0.2

we know that

20\%=20/100=0.20

\frac{1}{5}=0.20

therefore

0.20=0.20=0.20

This group represents equivalent ratios

case 4) we have

25%, 1/5, 0.2

we know that

25\%=25/100=0.25

\frac{1}{5}=0.20

therefore

0.25\neq0.20=0.20

This group not represents equivalent ratios

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Two angles of a quadrilateral are 40 degree and 60 degree and the ratio of remaining two angles is 7:6. The degree measure of re
Semenov [28]

Answer:

140,120

Step-by-step explanation:

sum of angles in a quadrilateral =360

sum of the 1st two angles=60+40=100

360-100=260

the ratio of the remaining angles 7:6

therefore:

\frac{7}{13}  \times 260

=140

for the second angle

260-140=120

5 0
3 years ago
HELP PLEASE
mario62 [17]

Answer:

26.4

Step-by-step explanation:

<u>Law Of Cosines:</u>

    cos(A)=\frac{b^2+c^2-a^2}{2bc}

    This should work for any side. This can generally be thought as:

   cos(\text{angle}) = \frac{\text{sum of squares of two other sides-opposite side squared}}{\text{2 times the product of the other two sides}}

    If this is too confusing here's the formula for the other sides (which is essentially the same, just different variables)

   cos(B)=\frac{a^2+c^2-b^2}{2ac}

   cos(C) =\frac{a^2+b^2-c^2}{2ab}

Anyways now just plug in the known values into the equation

cos(A)=\frac{4^2+6^2-3^2}{2(6)(4)}\\

Square and multiply values

cos(A)=\frac{16+36-9}{48}

Add the values in the numerator

cos(A)=\frac{43}{48}

Take the inverse of cosine on both sides

A=cos^{-1}(\frac{43}{48})

calculate arccosine (inverse cosine) using a calculator

A\approx 26.384

Round to nearest tenth

A\approx26.4

7 0
2 years ago
Estimate the percent of each number. 47% of 77
Anettt [7]

ANSWER

36 .19

EXPLANATION

We want to estimate

47\% \: of \: 77

This is the same as

\frac{47}{100}  \times 77

or

\frac{47}{100} \times  \frac{77}{1}

We multiply the numerators to get,

\frac{3619}{100}

We convert to decimals to get

36.19

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3 years ago
A sales rep earns $700 a month plus $30 for every part sold
natta225 [31]

Answer:

Salary=30(parts sold) + 700

Step-by-step explanation:

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3 years ago
Find the roots of sin(x) which lie in [0, pi]
defon

Answer:

Option (1)

Step-by-step explanation:

From the unit circle, we see that y, which represents sin(x) when x is 0 or pi.

5 0
2 years ago
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