2 years ago

Help me out Answer required

Mathematics

1 answer:

dexar [7]2 years ago

8 0

Answer:

a. rational

b. irrational

c. irrational

d. rational

e. rational

f. rational

plz mark me as brainliest

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If y varies directly with x when y=8,x=20 find the value of x when y=42

Alecsey [184]

The value of x is 105 when y=42

Step-by-step explanation:

A direct proportion means that the change in one quantity will also cause the change in other quantity

Given

y varies directly with x

x ∝ y

when the proportionality symbol is removed a proportionality constant is introduced

$x=ky\\k=\frac{x}{y}\\Putting\ y=8\ and\ x=20\\k=\frac{20}{8}\\k = \frac{5}{2}\\So,\ the\ equation\ will\ be\\x=\frac{5}{2}y\\Putting\ y=42\\x=\frac{5}{2}*42\\x=5*21\\x= 105$

The value of x is 105 when y=42

Keywords: Proportion, Direct variation

Learn more about proportion at:

#LearnwithBrainly

5 0

2 years ago

A cone with a height of 8 inches and a radius of 6 inches was dilated using a scale factor of 2. Which

Delvig [45]

Answer:

true yes sir

Step-by-step explanation:

8 0

3 years ago

Et f(x) = x2 + 6 and g(x) g(x) x+8/x . Find ( g o f)( -7)

earnstyle [38]

Answer:

Step-by-step explanation:

A function composition is where one function is substituted within another function and is written g(f(x)). Here we will substitute f(x) into g(x). For g(f(-7)), we substitute -7 for x.

$\frac{x^2+6+8}{x^2+6}$

Now substitute -7 for x.

$\frac{x^2+6+8}{x^2+6} = \frac{(-7)^2+6+8}{(-7)^2+6}=\frac{49+6+8}{49+6}=\frac{63}{55}$

6 0

3 years ago

Suppose that a homeowner notices a 20 percent increase in the water bill for July. The homeowner traces this increase to four so

djyliett [7]

Answer:46

Step-by-step explanation:

7 0

3 years ago

Today only a table is being sold for $364.89. This is 38% of its regular price. What was the price yesterday

Contact [7]

Answer:

$960.24

Step-by-step explanation:

Hello!

Let the regular price be x.

38% of x = 0.38x

0.38x = 364.89

<h3>Solve for x</h3>

0.38x = 364.89
x = 364.89/0.38
x = 960.2368421053 ≈ 960.24

The price of the table yesterday was around $960.24.

7 0

1 year ago

Help me out Answer required ​

Help me out Answer required