1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jolli1 [7]
3 years ago
11

Need help ASAP plzzzzzz tyyyyyyyyy

Mathematics
1 answer:
Marta_Voda [28]3 years ago
3 0

Answer:

(-3, -66) , (3, 6) , (5, 30)

Step-by-step explanation:

y= 12x-30=12(-3)-30=-36-30=-66

y=12x-30=12(3)-30=36-30=6

y=12x-30=12(5)-30=60-30=30

Remember PEMDAS, Parentheses Exponents Multiplication Division Additon Subtraction.

You might be interested in
Smallest to largest <br> 3/4 5/6 16/25 9/15
inn [45]

Answer: 3-4-5-6-9-15-16-25

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Some types of algae have the potential to cause damage to river ecosystems. Suppose the accompanying data on algae colony densit
Phantasy [73]

Answer:

y=-2.95836 x +234.56159

Step-by-step explanation:

We assume that th data is this one:

x: 50, 55, 50, 79, 44, 37, 70, 45, 49

y: 152, 48, 22, 35, 43, 171, 13, 185, 25

a) Compute the equation of the least-squares regression line. (Round your numerical values to five decimal places.)For this case we need to calculate the slope with the following formula:

m=\frac{S_{xy}}{S_{xx}}

Where:

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}

So we can find the sums like this:

\sum_{i=1}^n x_i =50+ 55+ 50+ 79+ 44+ 37+ 70+ 45+ 49=479

\sum_{i=1}^n y_i =152+ 48+ 22+ 35+ 43+ 171+ 13+ 185+ 25=694

\sum_{i=1}^n x^2_i =50^2 + 55^2 + 50^2 + 79^2 + 44^2 + 37^2 + 70^2 + 45^2 + 49^2=26897

\sum_{i=1}^n y^2_i =152^2 + 48^2 + 22^2 + 35^2 + 43^2 + 171^2 + 13^2 + 185^2 + 25^2=93226

\sum_{i=1}^n x_i y_i =50*152+ 55*48+ 50*22+ 79*35+ 44*43+ 37*171+ 70*13+ 45*185+ 49*25=32784

With these we can find the sums:

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=26897-\frac{479^2}{9}=1403.556

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}=32784-\frac{479*694}{9}=-4152.22

And the slope would be:

m=-\frac{-4152.222}{1403.556}=-2.95836

Nowe we can find the means for x and y like this:

\bar x= \frac{\sum x_i}{n}=\frac{479}{9}=53.222

\bar y= \frac{\sum y_i}{n}=\frac{694}{9}=77.111

And we can find the intercept using this:

b=\bar y -m \bar x=77.1111111-(-2.95836*53.22222222)=234.56159

So the line would be given by:

y=-2.95836 x +234.56159

7 0
3 years ago
Translate the following statement to an inequality.
Irina-Kira [14]

Answer:

Step-by-step explanation:

a number no less then 15

let the number be x

no less then 15....means it has to be 15 or more

x > = 15 (thats greater then or equal to)

3 0
3 years ago
What is the expression for the area of the old garden if the perimeter is 6w+8, where W represents the width?
musickatia [10]

Answer:

w(2w+4)

Step-by-step explanation:

we know A = l * w

and Perimeter = 2l + 2w

we want to find l in terms of w

2l + 2w = 6w + 8

2l = 4w + 8

l = 2w + 4

so A = w * (2w + 4)

8 0
3 years ago
If PQRS is a rhombus, which statements must be true? Check all that apply.
Alexxx [7]

Answer:

PT=RT

PR is prependicular to qs

PQ=QR

QPR is congruent to SPR

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • For which of the following inequalities is x greater than or equal to 4 a solution?
    15·1 answer
  • A field goal kicker has a 90% success rate for field goals less than 40 yards. What is the probability that the kicker makes the
    9·1 answer
  • Kaapo is mixing Kona beans and Maui beans to make 25 pounds of coffee blend. Kona beans cost Kaapo $15 per pound and Maui beans
    14·1 answer
  • <img src="https://tex.z-dn.net/?f=%28%20%20%7B81%7D%5E%7B%20%5Cfrac%7B1%7D%7B4%7D%20%7D%20%29%5E%7B4%7D%20" id="TexFormula1" tit
    14·1 answer
  • The sales of lawn mowers t years after a particular model is introduced is given by the function y = 5500 ln (9t + 4), where y i
    12·2 answers
  • The sum of a rational number and a irrational number is _____ rational
    8·2 answers
  • Mr. Ross is purchasing a table and chairs for $1350,including tax and interest. He will pay for the furniture with monthly payme
    11·1 answer
  • What is (3 x 20) + 9 and what is (4 x 100) + 20?
    12·2 answers
  • Rewrite 45 + 60 using the distributive property.
    12·2 answers
  • What is the product?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!