3 years ago

Use the figure to answer the question.

Mathematics

1 answer:

Kruka [31]3 years ago

7 0

Answer:

the correct answer is 30

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A man travels from town x to town y at an average rate of 60 mph and returns at an average rate of 50 mph. He takes a 1/2 hour l

Georgia [21]

D/60 + D/50 = 2D/55 - 1/2

find common denominator ( 3300)

3300/60 = 55

3300/50 = 66

3300/55=60

so then you get 55D +66D= 60(2D)-1650

121D=120D-1650

D=1650 miles

check

1650/60 =27.5, 1650/50 = 33, 27.5 + 33 = 60.5 hours total

1650/55 = 30, 30 x 2 = 60

60.5-60 = 0.5 longer

so distance = 1650 miles

3 0

3 years ago

How many times does 20 go into 74??

Dima020 [189]

About three times. Just divide 74 by 20 which is 3 but exactly it is 3.7.
hoped it helped

7 0

2 years ago

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Indicate all possible values for the variable in each of the expressions: sqrt(2x+2)+sqrt(6-4x)

IrinaK [193]

Answer:

Given expression:

$\sqrt{2x+2}+\sqrt{6-4x}$

The first root is valid when:

2x + 2 ≥ 0 ⇒ 2x ≥ - 2 ⇒ x ≥ - 1

The second root is valid when:

6 - 4x ≥ 0 ⇒ 4x ≤ 6 ⇒ x ≤ 1.5

So the variable x can get values within interval:

-1 ≤ x ≤ 1.5 or
x = [-1, 1.5]

3 0

2 years ago

In triangle ABC, c is the hypotenuse, 0=25°, and b =3, Find the length of c ?

Charra [1.4K]

Answer:

$\large\boxed{c\approx3.31}$

Step-by-step explanation:

Use cosine:

$cosine=\dfrac{adjacent}{hypotenuse}$

$\cos\theta=\dfrac{b}{c}$

We have:

$\theta=25^o\to\cos25^o\approx0.9063\\\\b=3$

Substitute:

$\dfrac{3}{c}=0.9063$

$\dfrac{3}{c}=\dfrac{9063}{10000}$ cross multiply

$9063c=30000$ divide both sides by 9063

$c\approx3.31$

8 0

3 years ago

HELP! LOTS OF POINTS

seropon [69]

Use the equation=
x^2+5^2=9^2
x^2+25=81
x^2+25-25=81-25
x^2=56
$\sqrt{x} = \sqrt{56}$
x=7.48331477355

5 0

2 years ago

Read 2 more answers