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3 years ago

Four times a number increased by 3 is -89

Mathematics

2 answers:

Likurg_2 [28]3 years ago

5 0

Answer:

-21.5

Step-by-step explanation:

so we will go backwards -89 + 3 = -86

-86/4 = -21.5

Hope this helps!

sp2606 [1]3 years ago

4 0

Answer:

-21.5

Step-by-step explanation:

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2 years ago

What (3×5^2)/(5)^2 equal? Plz answer fast and with work and I will give brainliest

balu736 [363]

Answer:

The answer is 3.

Step-by-step explanation:

Given that the Indices Law is,

${a}^{m} \div {a}^{n} = {a}^{m - n}$

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So the expression is :

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3 years ago

Cuanto es 4/5 de 55???????

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3 years ago

In a sample of 388 people in a certain, 22% had red hair. Find a 99% confidence interval for the proportion of people in the cou

Anit [1.1K]

Answer: (0.1658, 0.2742)

Step-by-step explanation:

Formula to find the confidence interval for population proportion is given by :-

$\hat{p}\pm z^*\sqrrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

, where n= sample size

z*= Critical value

$\hat{p}$ = sample proportion.

As per given , we have

Significance level : $\alpha=1-0.99=0.01$

According to z-table, Critical value for 99% confidence interval : z*=2.576

Let p be the proportion of people in the country that have red hair.

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Now, required confidence interval for proportion of people in the country that have red hair will be :-

$0.22\pm (2.576)\sqrt{\dfrac{0.22(1-0.22)}{388}}$

$0.22\pm (2.576)\sqrt{0.000442268}$

$0.22\pm (2.576)(0.02103)$

$(0.22-0.05417328,\ 0.22+0.05417328 )=(0.16582672,\ 0.27417328)\\\\\approx(0.1658,\ 0.2742)$

The 99% confidence interval for the proportion of people in the country that have red hair= (0.1658, 0.2742)

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2 years ago

Please hurry! What is the value of the expression when y=3?

lorasvet [3.4K]

Step-by-step explanation:

$= 12 + {4y}^{2} - 7$

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2 years ago