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3 years ago

Described and correct the error and finding slope and the y intercept of the graph of a linear equation.

Mathematics

1 answer:

Ludmilka [50]3 years ago

3 0

Compare y = 4x - 3 to the standard

y = mx + b.

You can see immediately that the slope, m, is 4 and that the y-intercept, b, is -3. The error lay in the explanation (see the problem statement) that the y-intercept is 3. That's not correct.

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joann is having a party. she wants to make punch. the recipe for punch uses 4 pints of orange juice, 5 cups of apple juice, 1/2

Aleks [24]

4 pints= 8 cups
+
1/2 gallon= 8 cups
+
2 quarts= 8 cups
+
5 cups
=29
no, she is off by a cup

7 0

3 years ago

A mistake was made in mixing the lemonade— PLEASE HELP!!

beks73 [17]

Answer:

Part A:

$4 + x = y$

$0.5*4 + 1*x = 0.7*y$

$x = 8/3\ quarts\ of\ 100\%\ solution$

$y = 20/3\ quarts\ of\ 70\%\ solution$

Part B:

$x + y = 10$

$2x + 3y = 23$

$x = 7$ and $y = 3$

Step-by-step explanation:

Part A:

The inicial concentration of the lemonade is 50%, and the volume is 4 quarts, and we will add x quarts of a lemonade with a concentration of 100%, so the total volume will be y, and the concentration will be 0.7, so we have that:

$4 + x = y$

$0.5*4 + 1*x = 0.7*y$

Using the value of y from the first equation in the second one, we have:

$2 + x = 0.7*(4 + x)$

$2 + x = 2.8 + 0.7x$

$0.3x = 0.8$

$x = 8/3\ quarts$

$y = 4 + 8/3 = 20/3\ quarts$

Part B:

If he shoots a total of ten targets, we can write the equation:

$x + y = 10$

Each stationary target is 2 points, and each moving target is 3 points, so if the total points is 23, we have:

$2x + 3y = 23$

If we subtract the second equation by two times the first one, we have:

$2x + 3y - 2*(x + y) = 23 - 2*10$

$2x + 3y - 2x - 2y = 23 - 20$

$y = 3$

$x + 3 = 10$ ⇒ $x = 7$

4 0

3 years ago

9 through 13 i need help ASAP

Zarrin [17]

I hope this helps you

8 0

3 years ago

Find the volume of the shape below. 5 cm 8 cm 4.5 cm Help

katen-ka-za [31]

90cm^3. First, determine the area of the right triangle face, A=1/2(b*h) - 1/2(4.5*5) = 11.25cm^2. This triangle is repeated over 8cm, so we multiply the 11.25cm^2 * 8cm = 90cm^3.

5 0

3 years ago

Read 2 more answers

Y - ( -3y ) what is the answer????

Nataly_w [17]

Answer:

Step-by-step explanation:

y - -3y

Subtracting a negative is like adding

y+3y

Combine like terms

7 0

3 years ago

Read 2 more answers