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3 years ago

Anyone know how to do these?

Mathematics

1 answer:

FinnZ [79.3K]3 years ago

6 0

Your doing it just fine that's the correct way .

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A= a+b over 2 solving for the variable B

vovikov84 [41]

A=a+b/2

A×2=a+b/2×2

A2=a+b

A2-a=a+b-a

A2-a=b

5 0

3 years ago

Mrs. Kellen's most recent math test consisted of 50 questions. Some of the questions were worth two points and the rest of the q

WARRIOR [948]

Answer:

The answer to your question is: 35 questions worth 2 points and 15 questions worth 3 points.

Step-by-step explanation:

Data

Number of questions = 50

Total points = 115

x = questions worth 2 points

y = questions worth 3 points

Process

write to equations

(1) --------------- x + y = 50

(2) -------------- 2x + 3y = 115

Solve them by substitution

x = 50 - y

2 (50 - y) + 3y = 115

100 - 2y + 3y = 115

3y -2 y = 115 - 100

y = 15

x = 50 - 15

x = 35

7 0

3 years ago

If x=8 and y=14. Find y when x=48

Sladkaya [172]

Answer:

Step-by-step explanation:

In picture shown.

6 0

3 years ago

Find the coordinates of the missing endpoint if P is the midpoint of Line Segment NQ.

dimaraw [331]

Midpoint formula is $(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$ .

So starting with this one, we will be solving for the coordinates of the unknown endpoint separately. Starting with the x-coordinate, since we know that the midpoint x-coordinate is 5 and the x-coordinate of N is 2, our equation is set up as such: $\frac{x+2}{2}=5$ From here we can solve for the x-coordinate of Q.

Firstly, multiply both sides by 2: $x+2=10$

Next, subtract both sides by 2 and your x-coordinate is $x=8$

With finding the y-coordinate, it's a similar process as with the x-coordinate except that we are using the y-coordinates of the midpoint and endpoint N.

$\frac{y+0}{2}=2\\ y=4$