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3 years ago

Ms. Medina asked the class to solve the equation 2(x+4)=18.

Mathematics

2 answers:

7nadin3 [17]3 years ago

4 0

Answer:

PEMDAS parentheses exponents multiplication divide add subtract....

rewona [7]3 years ago

3 0

Answer:

The distributive property

Step-by-step explanation:

He distributed 2 * x and 2 * 4 to get 2x +8

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Picture with question help plz

kirill [66]

Let $a_{1}$ = -9, $a_{2}$ = -12 and so on.

-15 = -9 + (-6)

-15 = -9 + 2(-3)

Let -3 be the common difference, or <em>d</em>.

$a_{n}$ = -9 + n(-3)

= -9 - 3n

6 0

3 years ago

School guidelines require that there must be at least 2 chaperones for every 25 students going on a school trip. How many chaper

Luba_88 [7]

2/25 = x/80....2 chaperones to 25 students = x chaperones to 80 students
cross multiply because this is a proportion
(25)(x) = (2)(80)
25x = 160
x = 160/25
x = 6.4......so basically, since u cant have .4 of a person, we need to round up, so the school needs 7 chaperones for 80 students

5 0

4 years ago

Evaluate the integral by interpreting it in terms of areas. In other words, draw a picture of the region the integral represents

valina [46]

Answer:

17/2

Step-by-step explanation:

The graph of the given absolute funciton |2xd-5| is attached below

Find the area of each triangle using the graph

Take the area from x=0 to 4

break the graph into two right angle triangle

Area of the triangle = 1/2 times base times height

Green triangle x=2.5 to 4

base = 3/2 and height = 3

Area of green part = $\frac{1}{2} \cdot \frac{3}{2} \cdot 3 =\frac{9}{4}$

Red triangle x=0 to 2.5

base = 5/2 and height = 5

Area of red part = $\frac{1}{2} \cdot \frac{5}{2} \cdot 5 =\frac{25}{4}$

Total area= $\frac{25}{4} +\frac{9}{4} =\frac{17}{2}$

4 0

3 years ago

How would I solve this system of equations? 2y+x=-17 5x-4y=-15

Ratling [72]

$\left\{\begin{array}{ccc}2y+x=-17\\5x-4y=-15\end{array}\right\\\\\left\{\begin{array}{ccc}x+2y=-17&\text{multiply both sides by 2}\\5x-4y=-15\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}2x+4y=-34\\5x-4y=-15\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad7x=-49\qquad\text{divide both sides by 7}\\.\qquad\boxed{x=-7}\\\\\text{Put the value of x to the first equation:}\\\\2y+(-7)=-17\\2y-7=-17\qquad\text{add 7 to both sides}\\2y=-10\qquad\text{divide both sides by 2}\\\boxed{y=-5}\\\\Answer:\ \boxed{x=-7\ and\ y=-5\to(-7,\ -5)}$

3 0

3 years ago

15. An equilateral triangle has side lengths that

lorasvet [3.4K]

Answer:

a) 3(1.2x - 8) or 3.6x - 24

3(1.2x - 8) = 12

1.2x - 8 = 4

1.2x = 12

x = 12/1.2

= 10

5 0

2 years ago