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NeX [460]
3 years ago
7

The prices of two ratios are in the ratio x:y

Mathematics
2 answers:
Archy [21]3 years ago
8 0

Answer:

4:1

Step-by-step explanation:

x+20 : y+20 = 5 : 2

(x+20)/(y+20) = 5/2

2(x+20) = 5(y+20)

2x+40 = 5y+100

2x = 5y+60 (1)

x-5 : y-5 = 5:1

(x-5)/(y-5) = 5/1

x-5 = 5(y-5)

x-5 = 5y-25

x = 5y-20 (2)

Solve (1) & (2) simultaneously,

2(5y-20) = 5y+60

10y-40 = 5y+60

5y = 100

y = 20

x = 5y-20

x = 5(20)-20 = 100-20

x = 80

x:y

80:20

4:1

Nitella [24]3 years ago
5 0
Answer: x:y = 2:5

Step-by-step explanation:
Given : The prices of two radios are in the ratio x:y
When the prices are both increased by £20, the ratio becomes 5:2
Then,
When the prices are both reduced by £5, the ratio becomes 5:1
Then,
Subtract (2) from (1), we get

Put this value in (2), we get

Now, the ratio of x:y=
Dividing 4 from both the numerator and denominator, we get
x:y= =2:5

Credit: JeanaShupp
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What is the area of a rectangle with side lengths of 5/12 foot and 2/3 foot
Minchanka [31]

Answer:   10/36

Step-by-step explanation:

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3 years ago
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If f(x)= x2 + 2 and g(x)= 2x-1, find (f ° g)(5).
valentinak56 [21]
I hope this helps you

4 0
3 years ago
Caroline, Colin & Sarah share some money.
Alex787 [66]

Caroline, Colin & Sarah share some money.Caroline will get \dfrac{2}{3}  when Caroline, Colin & Sarah share some money.

<h3>What is the ratio?</h3>

The ratio defined as the sharing of the two or three things or it represent that one thing or number is how many times to the other.

One part is excluded in the problem. That part is:

"Caroline gets \dfrac{1}{9} of the money."

If Caroline gets 1/9th, then remaining is:

1-\dfrac{1}{9}=\dfrac{8}{9}

Colin and Sarah share in ratio 3 is to 1, that means 3 + 1 = 4 parts...

8/9th in 4 parts means, each part is:

\dfrac{\dfrac{8}{9}}{4}=\dfrac{2}{9}

We know Colin gets "3" parts of the total, each part is (2/9)th, so 3 parts would be:

3\times \dfrac{2}{9}=\dfrac{6}{9}=\dfrac{2}{3}

Colin gets  \dfrac{2}{3} money when three of them share money.

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8 0
2 years ago
Everyone please answer one of these my birthday tuesday but i might be in trouble if i fail this :(
Andreas93 [3]

Answer:

11. b

10.d

9.c

7.b

1.d

the rest I can't see clearly

please give brainiest

Step-by-step explanation:

11.

3/x-4=7/x

*cross multiply

3x=7 (x-4)

3x=7x-28

28=7x-3x

28=4x

x=7

10.

SOHCAHTOA

Cos☆=11/14

cos^-1 (11/14)

☆=38.21 degrees

9.

MLN CONGRUENT TO WBN

ML/WB=LN/BN=MN/WN

LN/BN=10/6

ML/WB

24/x=10/6

24x6=10x

144÷10

=14.4

6^2+14.4^2

=243.36

squareroot

=15.6

8 0
2 years ago
The picture shows a barn door:
Hitman42 [59]

Answer:

(D)9 divided by sin 60 degrees

Step-by-step explanation:

From the given figure, using trigonometry

\frac{BC}{AB}=sin60^{{\circ}}

Substituting the given values, we get

\frac{9}{AB}=sin60^{{\circ}}

\frac{9}{sin60^{\circ}}=AB

AB=\frac{9{\times}2}{\sqrt{3}}

AB=\frac{18}{\sqrt{3}}

AB=10.4 feet

Thus, The length of the support AB is 9 divided by sin 60 degrees.

5 0
3 years ago
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