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3 years ago

Si sumamos el cuadrado de un número más el cuadruple del siguiente resulta 225 ¿De que número se trata?

Mathematics

1 answer:

Talja [164]3 years ago

5 0

Answer:

What does it say in english

Step-by-step explanation:

ill answer it in comments if you tell me what it says in english

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What is the percent increase when 7,200 increases by 1,800?

sergeinik [125]

Answer:

25 percent

Step-by-step explanation:

7200 divided by 1800 is 25

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3 years ago

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Please I need hep, get free brainly :D

padilas [110]

Step-by-step explanation:

Formula:

$\boxed{a = 3.14(r)^{2} }$

r represents the radius.

The radius is 1/2 of the diameter.

Since 1/2 of 16 is 8, 8 is our radius.

Substitute:

$a = 3.14(8)^{2}$

Solve:

$a = 3.14(64)$

$a = 200.96in^{2}$

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2 years ago

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The function c ( x ) = 63 ⋅ ( 1.03 ) x models the cost in dollars, c , of 1 ounce of a certain chemical used in a laboratory. x

Fudgin [204]

9514 1404 393

Answer:

$98.15

Step-by-step explanation:

2005 is 15 years after 1990. Using the formula we find ...

c(15) = 63·1.03^15 ≈ 63·1.55797

c(15) ≈ 98.152

An ounce of the chemical costs about $98.15 in 2005.

4 0

3 years ago

A random sample of 38 wheel chair users were asked whether they preferred cushion type A or B, and 28 of them preferred type A w

-BARSIC- [3]

Answer:

The statement that cushion A is twice as popular as cushion B cannot be verified

Step-by-step explanation:

From the question we are told that:

Sample size n=38

Type a size A $X_a=28$

Type a size B $X_b=10$

Generally the probability of choosing cushion A P(a) is mathematically given by

$P(a)=\frac{28}{38}$

$P(a)=0.73$

Generally the equation for A to be twice as popular as B is mathematically given by

$P(b)+2P(b)=3P$

Therefore Hypothesis

$Null H_0: p \leq \frac{2P}{3P} \\Altenative H_A:p>\frac{2P}{3P}$

Generally the equation normal approx of p value is mathematically given by

$z=\frac{x-np_0-0.5}{\sqrt{np_0(1-p_0)} }$

$z=\frac{28-(38*2/3)_0-0.5}{\sqrt{38*2/3*1/3} }$

$z=0.75$

Therefore from distribution table

$Pvalue=1-\theta (0.75)$

$Pvalue=0.227$

Therefore there is no sufficient evidence to disagree with the Null hypothesis $H_0$

Therefore the statement that cushion A is twice as popular as cushion B cannot be verified

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3 years ago

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Answer: electricity can be used to create magnetism

Step-by-step explanation:

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3 years ago