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3 years ago

Function A

Mathematics

1 answer:

Viktor [21]3 years ago

3 0

The answer would be 9 because

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Geometry math question

Brut [27]

Look at the picture.

Let |AE| = |AD| = b

We have a proportion:

$\dfrac{x}{13}{y}=\dfrac{19}{y+a}=\dfrac{x}{y+2a}$

Solve for y from first proportion

$\dfrac{13}{y}=\dfrac{19}{y+a}\ \ \ |\text{cross multiply}\\\\19y=13(y+a)\\\\19y=13y+13a\ \ \ \ |-13y\\\\6y=13a\ \ \ |:6\\\\y=\dfrac{13}{6}a$

Substitute to the second proportion

$\dfrac{19}{y+a}=\dfrac{x}{y+2a}\\\downarrow\\\dfrac{19}{\frac{13}{6}a+a}=\dfrac{x}{\frac{13}{6}a+2a}\\\\\dfrac{19}{\frac{13}{6}a+\frac{6}{6}a}=\dfrac{x}{\frac{13}{6}a+\frac{12}{6}a}\\\\\dfrac{19}{\frac{19}{6}a}=\dfrac{x}{\frac{25}{6}a}\ \ \ \ |\dot a\neq0\\\\\dfrac{19}{\frac{19}{6}}=\dfrac{x}{\frac{25}{6}}\\\\19\cdot\dfrac{6}{19}=x\cdot\dfrac{6}{25}\\\\6=\dfrac{6x}{25}\ \ \ |\cdot25\\\\6x=6\cdot25\ \ \ |:6\\\\x=25$

Answer: B. 25

7 0

4 years ago

James wants to send two gifts by mail. one package weighs 2 3/4 pounds. the other package weighs 1 3/4 pounds. what is the total

Taya2010 [7]

Answer:

4.5 pounds

Step-by-step explanation:

Convert them both to improper equations.

2 3/4 = 11/4

1 3/4 = 7/4

Then add.

11/4 + 7/4 = 18/4

Then simplify.

18/4 = 4 2/4 = 4.5

7 0

3 years ago

Read 2 more answers

Using proportional reasoning, about how many of 180 seventh grade students in school would like to snorkel

amm1812

Answer:

We need some aditional data. For example, the average number of students who like to snorkel in certain population.

Step-by-step explanation:

3 0

3 years ago

You are the owner of a toy store and preparing to make a donation to a local children's hospital you must prepare 320 teddy bear

Nookie1986 [14]

Answer:

90 feet

Step-by-step explanation:

320 (1/8) = 40

3/4 (40) = 30 yards

1 yard = 3 feet

30 (3) = 90 feet

3 0

3 years ago

How long would it take for a race car traveling at a speed of 150 km/hr to travel 3000m?

IRINA_888 [86]

Answer:

1.2 minutes

Step-by-step explanation:

The applicable relationship between speed, distance, and time is ...

time = distance/speed

= (3 km)/(150 km/h) = (3/150) h = 1/50 h

= (60 min)/50 = 1.2 minutes

6 0

3 years ago