All categories

4 years ago

Evaluate this expression : 3x - 2y +8 if 6 and y= 5

Mathematics

1 answer:

Nataly_w [17]4 years ago

6 0

Answer:

$8$

Step-by-step explanation:

$3x - 2y + 8 = 3(6) - 2(5) = 18 - 10 = 8$

You might be interested in

PLS HELP!! WILL GIVE BRAINLIEST!!

Sergeeva-Olga [200]

Answer:

you do -4 + 54 ÷2 = -29

5 0

2 years ago

If 6 is subtracted from a number the result is 39.

Paha777 [63]

Answer:

Step-by-step explanation:

To find the number you just add 6 to 39 which gets you 45.

5 0

3 years ago

Read 2 more answers

The mean score on a physics test was 75 points. Amy’s score was 67 points, which was 2 standard deviations below the mean.

Marrrta [24]

Answer:

Step-by-step explanation:

3 0

3 years ago

1.4(0.5x+4.2y)−3.5(0.2x−1.5y) simplify lots of points

Vilka [71]

1,4(0,5x + 4,2y) - 3,5(0,2x - 1,5y)

1,4.0,5x + 1,4.4,2y - 3,5.0,2x + 3,5.1,5y

0,7x + 5,88y - 0,7x + 5,25y

0,7x - 0,7x + 5,88y + 5,25y

11,13y

7 0

4 years ago

Beatrice calculated the slope between two pairs of points.

kumpel [21]

Answer:

The answer in the procedure

Step-by-step explanation:

we know that

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

$m=\frac{y2-y1}{x2-x1}$

step 1

Find the slope between (-3, -2) and (1, 0)

$m=\frac{0+2}{1+3}$

$m=\frac{2}{4}=\frac{1}{2}$

Find the equation of the line

$y-y1=m(x-x1)$

with m and the point (1,0)

substitute

$y-0=\frac{1}{2}(x-1)$

$y=\frac{1}{2}x-\frac{1}{2}$

step 2

Find the slope between (-2, -1) and (4, 2)

$m=\frac{2+1}{4+2}$

$m=\frac{3}{6}=\frac{1}{2}$

Find the equation of the line

$y-y1=m(x-x1)$

with m and the point (4,2)

substitute

$y-2=\frac{1}{2}(x-4)$

$y=\frac{1}{2}x-2+2$

$y=\frac{1}{2}x$

Compare the equation of the two lines

The two lines are parallel, because their slope is the same, but are different lines

therefore

Beatrice's conclusion is incorrect

All of these points are not on the same line, because are different parallel lines

The slope between (-2,-1) and (1,0) is equal to $\frac{1}{2}$

8 0

4 years ago

Read 2 more answers