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3 years ago

Pleasseee helppp!!!what is the value of x and y ?

Mathematics

1 answer:

sergeinik [125]3 years ago

6 0

D ywt20 -r1 ywgsyeygygffyu

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20 POINTS!!!<br><br> I need help urgently with the question in the picture below!

Elodia [21]

Let f(x)=ax+b
11a+b=23.55
12a+b=25.35

solve: a=1.8 b=3.75
so ..

f(x)=1.8x+3.75
if x=31 , f(x)=59.55

7 0

3 years ago

Graph y-3=1^2(x+2) on a sheet of paper please

VARVARA [1.3K]

Y-3=1^2(x+2) (distribute 1^2) y-3=x+2 (add 3 to both sides)y=x+5your y intercept is 5 and your slope is 1

8 0

3 years ago

A company interested in lumbering rights for a certain tract of slash pine trees is told that the mean diameter of these trees i

brilliants [131]

Answer:

97.6% of the trees will have diameters between 7.6 and 18.6 inches.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 12 inches

Standard Deviation, σ = 2.2 inches

We are given that the distribution of diameter of tree is a mound shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(diameters between 7.6 and 18.6 inches)

$P(7.6 \leq x \leq 18.6) = P(\displaystyle\frac{7.6 - 12}{2.2} \leq z \leq \displaystyle\frac{18.6-12}{2.2}) = P(-2 \leq z \leq 3)\\\\= P(z \leq 3) - P(z < -2)\\= 0.999 - 0.023 = 0.976= 97.6\%$

$P(7.6 \leq x \leq 18.6) = 97.6\%$

97.6% of the trees will have diameters between 7.6 and 18.6 inches.

8 0

3 years ago

Evaluate each expression for r=9 n t=14 enter in your numerical answer

Neko [114]

Answer:

1764

Step-by-step explanation:

$from \: the \: question \: rt {}^{2} \\ were \: r =9 \\ and \: t = 14 \\ rt {}^{2} = 9 \times (14) {}^{2} = 9 \times 196 = 1764$

3 0

2 years ago

Read 2 more answers

Find the upper limit for the zeros of the function P(x)=4x^4+8x^3-7x^2-21x-9

pishuonlain [190]

Answer:

OPTION B - 2

Step-by-step explanation:

What is the upper limit for the zeros of the function P(x) = 4x^4 + 8x^3 - 7x^2 - 21x - 9. Ans: 2 is an upper limit. Use synthetic division. and the remainder are all positive, 2 is an upper limit.

3 0

3 years ago