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3 years ago

PLZ HELP I WILL GIVE THE BRAINLY!!!!

Mathematics

1 answer:

ankoles [38]3 years ago

8 0

Answer:

♡♤

Step-by-step explanation:

cosy°=8/s

beacuse it will be multiplied cosly

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At which values of x does the function F(x) have a vertical asymptote? Check

Tresset [83]

Answer:

4 and -1

Step-by-step explanation:

a p e x

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3 years ago

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DEF is a right angled triangle calculate the length of EF correct to 3 sigificant figures

Vesnalui [34]

Answer:

$\displaystyle EF \approx 15.9$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Trigonometry

[Right Triangles Only] SOHCAHTOA
[Right Triangles Only] cosθ = adjacent over hypotenuse

Step-by-step explanation:

Step 1: Define

Angle θ = 28°

Adjacent Leg = EF = x

Hypotenuse = DF = 18

Step 2: Solve for x

Substitute in variables [Cosine]: $\displaystyle cos28^\circ = \frac{x}{18}$
[Multiplication Property of Equality] Multiply 18 on both sides: $\displaystyle 18cos28^\circ = x$
Evaluate trig: $\displaystyle 18(0.882948) = x$
Multiply: $\displaystyle 15.8931 = x$
Rewrite: $\displaystyle EF = 15.8931$
Round: $\displaystyle EF \approx 15.9$

8 0

3 years ago

Susan makes purple paint by mixing red and blue paint in the ratio 2:3

viktelen [127]

25ml — you add up the two numbers in the ratio, and that makes 5 (2+3), you then need to make sure that your answer is a multiple of 5 while being in the ratio 2:3. You then add up the 2 colours of paint

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2 years ago

If a sample of n = 4 scores is obtained from a population with μ = 70 and σ = 12, then what is the z-score corresponding to a sa

ratelena [41]

Answer:

$Z = 1$

Step-by-step explanation:

To solve this question, we have to know what a z-score is and the central limit theorem.

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central limit Theorem:

The Central Limit Theorem estabilishes that, for a random variable X, with mean $\mu$ and standard deviation $\sigma$ , a large sample size can be approximated to a normal distribution with mean $\mu$ and standard deviation, which is also called standard error $s = \frac{\sigma}{\sqrt{n}}$