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2 years ago

Solve the equation 3/y = 4/5

Mathematics

2 answers:

Alexeev081 [22]2 years ago

8 0

Answer:

15/4

Step-by-step explanation:

3/y=4/5

3=4/5(y)

3(5)=4y

15=4y

15/4=y

netineya [11]2 years ago

4 0

Step-by-step explanation:

Step 1: Cross Multiply

$\frac{3}{y} = \frac{4}{5}$

$5(3) = 4(y)$

$15 = 4y$

Step 2: Divide both sides by 4

$15 / 4 = 4y / 4$

$3.75 = y$

Answer: $y = 3.75$

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pentagon [3]

Answer:

Step-by-step explanation:

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2 years ago

Which statements about the diagram are true? Select three

stepan [7]

Answer : The correct options are:

DE + EF > DF

5 < DF < 13

Δ DEF is a scalene triangle.

Step-by-step explanation :

As we know that there are three types of triangle.

(1) Equilateral triangle : It is a triangle in which the three sides and angle are equal.

(2) Isosceles triangle : It is a triangle in which the two sides and two angle are equal.

(3) Scalene triangle : It is a triangle in which the three sides and angle are not equal.

Now we have to determine the length DF.

using Pythagoras theorem:

$(Hypotenus)^2=(Perpendicular)^2+(Base)^2$

$(9)^2=(Perpendicular)^2+(4)^2$

$81=(Perpendicular)^2+16$

$(Perpendicular)^2=81-16$

$(Perpendicular)^2=65$

$Perpendicular=8.06$

The length DF = 8.06 unit

So, we can say that:

DE + EF > DF

Hence, from the given options we conclude that, the correct options are:

DE + EF > DF

5 < DF < 13

Δ DEF is a scalene triangle.

8 0

2 years ago

Read 2 more answers

Plz help this is due tonight and I have no clue :(

motikmotik

Section 1:

using this format we can determine what the answer is:

42 105
—— • ——-
100 x

(the spacing may be off but imagine two separate fractions)

first multiply 100 by 105 to get 10,500

then divide by 42 to get 250

this means that sasha’s book has 250 pages

section b:

using the same formula we can solve this problem:

first we need to multiply 250 by 2 to get the total cost of both tickets

175 x
—— • ——
100 500

(again spacing may be off but think of two separate fractions)

then multiply 500 by 175 to get 87,500

then divide by 100 to get 875

to find the profit subtract 875-500

this means he will make $375 profit

conclusion:

sasha’s book has 250 pages

trevor will make $375 profit

this is the method my teacher taught me last year so it should be right, hope this helps and please mark brainliest!!

8 0

2 years ago

For a random sample of 50 measurements on the breaking strength of cotton threads, the mean breaking strength was found to be 21

Vikentia [17]

Answer:

205.81 to 214.19

Step-by-step explanation:

Sample size (n) = 50

Sample mean weight (X) = 210 grams

Sample standard deviation (s) = 18 grams

Confidence coefficient (Z) at 90% = 1.645

The confidence interval for the true mean breaking strength of cotton threads of this type, at a 90% confidence level, is given by:

$CI=X \pm Z*\frac{s}{\sqrt n}\\CI=210 \pm 1.645*\frac{18}{\sqrt 50}\\CI = 210 \pm 4.19\\CI =205.81\ to\ 214.19$

The confidence interval is 205.81 grams to 214.19 grams.

6 0

2 years ago

If yesterday's day after tomorrow is Sunday, what day is tomorrow's day before yesterday?

gizmo_the_mogwai [7]

Answer:

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Step-by-step explanation:

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1 year ago