MATHEMATICS HIGH SCHOOL

PLEASE HELPAt midnight, the outside temperature was –12⁰. By 6:00
a. m. the outside temperature had dropped 6⁰.
What was the outside temperature at 6:00
a. m.?
a. –18⁰
b. –6⁰
c. 6⁰
d. 18⁰

Answers

Answer 1
Answer: If you use/make a number line, then you will see that the answer is -18 or a. When using a number line, negative = ← and positive = →.

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Melissa is making clothes for her dolls. She has 7/8 yard of fabric. Each doll shirt requires 2/7 of a yard of fabric. How many whole shirts can she make for her dolls? a. 2 b. 3 c. 4 d. 5
The vertices of triangle WXY have coordinates W(3, 2), X(5, 5), and Y(7, 3). Triangle WXY was transformed to produce triangle WꞌXꞌYꞌ, with coordinates Wꞌ(−2, −1) and Yꞌ(2, 0).What are the coordinates of vertex Xꞌ?

Factor the following expression...
x^2 - 2x - 3

Answers

Trying to factor by splitting the middle term

 1.1     Factoring  x2-2x-3 

The first term is,  x2  its coefficient is  1 .
The middle term is,  -2x  its coefficient is  -2 .
The last term, "the constant", is  -3 

Step-1 : Multiply the coefficient of the first term by the constant   1 • -3 = -3 

Step-2 : Find two factors of  -3  whose sum equals the coefficient of the middle term, which is   -2 .

     -3   +   1   =   -2   That's it


Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -3  and  1 
                     x2 - 3x + 1x - 3

Step-4 : Add up the first 2 terms, pulling out like factors :
                    x • (x-3)
              Add up the last 2 terms, pulling out common factors :
                     1 • (x-3)
Step-5 : Add up the four terms of step 4 :
                    (x+1)  •  (x-3)
             Which is the desired factorization

Final result : (x + 1) • (x - 3) 

hope this helps hope i am brainliest i need it 

The length of a field in feet is a function f(n) of the length nin yards. Write a function rule for this situation.

Answers

Given:

The length of field is n yards.

The length of a field in feet is a function f(n).

To find:

The function rule for this situation.

Solution:

We know that,

1 yard = 3 feet

Using this conversion, we get

n yard = 3n feet

The length of field is n yards. So, the length of the field is 3n feets.

The length of a field in feet is a function f(n). So,

f(n)=3n

Therefore, the required function rule for this situation is f(n)=3n.

Solve each equation with quadratic formula.2v2+12v-27=9v

Answers

2v^2+12v-27=9v\ \ \ \ /-9v\n\n2v^2+3v-27=0\n\na=2;\ b=3;\ c=-27\n\n\Delta=b^2-4ac\n\n\Delta=3^2-4\cdot2\cdot(-27)=9+216=225\n\nv_1=(-b-\sqrt\Delta)/(2a);\ v_2=(-b+\sqrt\Delta)/(2a)\n\nv_1=(-3-√(225))/(2\cdot2)=(-3-15)/(4)=(-18)/(4)=-4(1)/(2)\n\nv_2=(-3+15)/(2\cdot2)=(12)/(4)=3

2v^2+3v-27=0\n\n2(v+4(1)/(2))(v-3)=0\n\nAnswer:v=-4(1)/(2)\ \vee\ v=3.

1/3*h(-8) h(x)= x^2 - 5x +7

Answers

Answer: 37

Step-by-step explanation:

    First, we need to find what h(-8) is. We can do this by substituting and simplifying the given function.

Given:

  h(x) = x² - 5x +7

Substitute:

  h(-8) = (-8)² - 5(-8) +7

Square and multiply:

  h(-8) = 64 + 40 +7

Add:

  h(-8) = 111

    Next, we can find one-third of this. To do this, we will multiply.

Multiply:

  (1/3) * 111 = 37

SOLVE for r.
V=(1/3)pi r^2 h

Answers

V=(1/3)pi r^2 h
3V = pi r^2 h
3V/pi = r^2 h
3V/h*pi = r^2
r = sqrt (3V/h*pi)
This is a picture of the answer.

What fraction of students wears black or white shoes? 1/2 wear black shoes and 2/5 wear white shoes

Answers

Answer:

Step-by-step explanation:

You want to add these two fraction together so they need to have the same denominator. Find the common denominator by multiplying both denominators

2x5=10

then convert the fractions

(1/2)x5=5/10

(2/5)x2=4/10

now you can add them

(5/10)+(4/10)=9/10

so 9/10 students wear black or white shoes

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-10n + 3(8+8n)=-6(n-4)