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3 years ago

10

Help me please!! As soon as you can!!

1 answer:

Mrrafil [7]3 years ago

3 0

The answer: X plus X+4

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Which students line segments have a midpoint of (-1,4)? Select all that apply A. Student 1 B. Student 2 C. Student 3 D. Student

SashulF [63]

Answer:

C. Student 3

E. Student 5

Step-by-step explanation:

we know that

The formula to calculate the midpoint between two points is equal to

$M(\frac{x1+x2}{2},\frac{y1+y2}{2})$

<u><em>Verify the midpoint of each student</em></u>

student 1

we have the endpoints

(-9,0) and (11,-8)

substitute in the formula

$M(\frac{-9+11}{2},\frac{0-8}{2})$

$M(1,-4)$

so

The midpoint is not (-1,4)

student 2

we have the endpoints

(-6,-1) and (4,-7)

substitute in the formula

$M(\frac{-6+4}{2},\frac{-1-7}{2})$

$M(-1,-4)$

so

The midpoint is not (-1,4)

student 3

we have the endpoints

(-5,2) and (3,6)

substitute in the formula

$M(\frac{-5+3}{2},\frac{2+6}{2})$

$M(-1,4)$

so

<u>The midpoint is equal to (-1,4)</u>

student 4

we have the endpoints

(-3,10) and (5,-2)

substitute in the formula

$M(\frac{-3+5}{2},\frac{10-2}{2})$

$M(1,4)$

so

The midpoint is not (-1,4)

student 5

we have the endpoints

(0,-3) and (-2,11)

substitute in the formula

$M(\frac{0-2}{2},\frac{-3+11}{2})$

$M(-1,4)$

so

<u>The midpoint is equal to (-1,4)</u>

therefore

Student 3 and student 5

3 0

3 years ago

stiks02 [169]

Answer:

Q2. Original 100%

New Selling price=100% - 25% = 75% of original

Sale price of bracelet= 75/100 × 44 = $33

Q3. 100%- 25%= 75%

Cost of table= 75/100 × 425= $318.75

Alternatively,

Discount= 25/100 × 425 = $106.25

Cost of table= $425- $106.25= $318.75

Q4. 10 cans ---- $4

1 can= 4÷10 = $0.40

15 cans= $0.40 ×15 = $6

Q5. Total number of children= 35+5= 40

Total people= 10+40 = 50

Thus, the ratio is 40:50= 4:5 (<em>divide by 10</em>)

3 0

3 years ago

Consider the function f(x) = 10x^2 + 6x - 2 when x=3

Savatey [412]

Answer:

106

Step-by-step explanation:

Substitute x = 3 into f(x) and evaluate , that is

f(3)

= 10(3)² + 6(3) - 2 = 10(9) + 18 - 2 = 90 + 18 - 2 = 106

5 0

3 years ago

Uhh help lol<br> 5.3x + y = 28.5 <br> 4.2x + 3.1y = 27.2<br> find x and y

navik [9.2K]

Answer:

x = 5, y = 2

Step-by-step explanation:

First, isolate y in the top equation.

$y = -5.3x+28.5$

Next, substitute y in the bottom equation.

$4.2x + 3.1(-5.3x + 28.5) = 27.2$

$5.3x + y = 28.5$

Simplify.

$4.2x + -16.43x + 88.35 = 27.2$

Combine like terms.

$-12.23x + 88.35 = 27.2$

Isolate x on one side.

$-12.23x = -61.15$

Isolate x.

$x = 5$

Substitute x into $5.3x + y = 28.5$

$5.3(5) + y = 28.5$

Simplify.

$26.5 + y = 28.5$

Isolate y.

$y = 2$

$x = 5 \\y = 2$

6 0

3 years ago

Can someone pleaseeeeeehelp me

Effectus [21]

the answer will be bbcuz

7 0

3 years ago