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3 years ago

Detailed explanation please! (will give Brainliest)

Mathematics

2 answers:

Masteriza [31]3 years ago

8 0

Answer:

Step-by-step explanation:

(x / 2) + 4 = 10

(x + 2 * 4 ) / 2 = 10

x + 8 = 20

x = 20 - 8

x = 12

or just

x /2 = 10 -4 = 6

x = 6 * 2 = 12

irina [24]3 years ago

6 0

Answer:

x = 12

Step-by-step explanation:

First multiply everything by 2 getting x alone giving you x + 8 = 20 then move 8 to the other side giving you x = 20 - 8 and then subtract giving you x = 12

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Please hurry will give Brainliest answer please quick

Keith_Richards [23]

Y is the answer so thank me later

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3 years ago

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In science class, Jada uses a graduated cylinder with water in it to measure the volume of some marbles. After dropping in 4 mar

Monica [59]

Answer:

1. 0.17 because ur mom

2. 9.52 cus im better

3. 11.53 cus ur trash

4. yes cus constant rate of change

Step-by-step explanation:

7 0

3 years ago

I need answer on this graphing va substitution.Problem 7 I tried to solve it but not sure that’s correct

Bond [772]

Given the system of equations:

$\begin{gathered} 2x+9y=27 \\ x-3y=-24 \end{gathered}$

To solve it by substitution, follow the steps below.

Step 1: Solve one linear equation for x in terms of y.

Let's choose the second equation. To solve it for x, add 3y to each side of the equations.

$\begin{gathered} x-3y=-24 \\ x-3y+3y=-24+3y \\ x=-24+3y \end{gathered}$

Step 2: Substitute the expression found for x in the first equation.

$\begin{gathered} 2x+9y=27 \\ 2\cdot(-24+3y)+9y=27 \\ -48+6y+9y=27 \\ -48+15y=27 \end{gathered}$

Step 3: Isolate y in the equation found in step 2.

To do it, first, add 48 to both sides.

$\begin{gathered} -48+15y=27 \\ -48+15y+48=27+48 \\ 15y=75 \end{gathered}$

Then, divide both sides by 15.

$\begin{gathered} \frac{15y}{15}=\frac{75}{15} \\ y=5 \end{gathered}$

Step 4: Substitute y by 5 in the relation found in step 1 to find x.

$\begin{gathered} x=-24+3y \\ x=-24+3\cdot5 \\ x=-24+15 \\ x=-9 \end{gathered}$

Answer:

x = -9

y = 5

or (-9, 5)

Also, you can graph the lines by choosing two points from each equation, according to the picture below.

7 0

1 year ago

The table shows the change in the water level (in centimeters) of a reservoir for three months.

dem82 [27]

Answer:

- 1 5/24 cm

Step-by-step explanation:

We'll have to get the fractions to a common denominator. the least common denominator for 3 and 80 is 240.

So - 1 1/3 = - 1 80/240 = 320/240

21/80 = 63/240

-11/80 = -33/240

-------------------------------------

-320/240 + 63/240 - 33/240 = -290/240 = - 1 50/240 = -1 5/24 cm

7 0

3 years ago

What is 2x-4. I really don’t understand

ddd [48]

Answer:

2 * -4 = -8

Step-by-step explanation:

2 * -4 = -8

It is just like multiplying two numbers like... 2 * 4 = 8

You must need to know that:

+a * -b = -c

-a * -b = +c

+a * +b = +c

In your question;

+a * -b = -c

a = 2

b = -4

c = -8

therefore:

2 * -4 = -8

3 0

3 years ago