-4x- y = -17 still don’t understand it

The tables below show running hours of three printers that produce greeting cards and the total number of greeting cards produce

AysviL [449]

ANSWER

The correct answer is A

EXPLANATION

To find the ink cost of each card coming from printer B, we need to find the total cost from printer B and the total number of cards printed by Printer B.

The total hours of all the three printers over the three weeks

$=40+45+55+50+50+30+45+40+60=415$

The total hours of printer B only

$=50+50+30=130$

Total number of cards produced over the three weeks

$=7950+7800+9600=25350$

We can use ratio and proportion to determine the total cards produce by printer B only.

$415:25350$

$130:x$

If less, more divides

$x=\frac{130\times 25350}{415} \approx7941$

Total cost of Printer B in 130 hours

$ $=130 \times 15=1950$

The ink cost

$=\frac{1950}{7941}$

$=0.2456$

$ $\approx 0.30$

to 2 decimal places

8 0

4 years ago

Read 2 more answers

at a grocery store, an uncooked beef roast is on sale for $5.99/lb. At the same grocery store, prepared roast beef is available

-Dominant- [34]

Answer:

$7.58/lb

Step-by-step explanation:

raw roast: $5.99 per lb

deli roast: $2.99 for 100g

We know the price per lb of the raw roast.

Let's find the price per lb of the deli roast.

1 lb = 454 grams

454 grams / 100 grams = 4.54

1 lb is 4.54 times 100 g

If we multiply the price of 100g of deli roast by 4.54, we get teh price per lb.

$2.99/lb * 4.54 = $13.57/lb

raw roast: $5.99/lb

deli roast: $13.57/lb

difference in price of 1 lb: $13.57 - $5.99 = $7.58

Answer: $7.58/lb

3 0

3 years ago

Read 2 more answers

In the diagram all measurements are in centimetres.

Luda [366]

Perimeter of the quadrilateral = 48 cm

Solution:

The dimensions of the quadrilateral are 2x, 2x – 1, x – 3 and 3x.

The dimensions of the triangle are x + 3, 5 and x + 3.

Perimeter of the polygon = Sum of the sides of the polygon

The perimeter of the quadrilateral = 2 × Perimeter of the triangle

2x + 2x – 1 + x – 3 + 3x = 2 × (x + 3 + 5 + x + 3)

8x – 4 = 2 × (2x + 11)

8x – 4 = 4x + 22

Add 4 on both sides of the equation.

8x = 4x + 26

Subtract 4x on both sides of the equation.

4x = 26

Divide by 4 on both sides of the equation.

x = 6.5

Perimeter of the quadrilateral = 2 × (x + 3 + 5 + x + 3)

Perimeter of the quadrilateral = 2 × (6.5 + 3 + 5 + 6.5 + 3)

= 2 × (9.5 + 5 + 9.5)

= 2 × 24

= 48

Perimeter of the quadrilateral = 48 cm

3 0

4 years ago

Graph the linear equation in three plots: -x+2y=11

MariettaO [177]

Answer:

<h2>In the attachment.</h2>

Step-by-step explanation:

Convert the given equation to the form y = mx + b:

$-x+2y=11$ add x to both sides

$2y=x+11$ divide both sides by 2

$y=\dfrac{1}{2}x+\dfrac{11}{2}$

It's a linear function.

We need only two points to plot the graph. Select any two x values, insert into the equation and calculate y values.

for x = 1

$y=\dfrac{1}{2}(1)+\dfrac{11}{2}=\dfrac{1}{2}+\dfrac{11}{2}=\dfrac{12}{2}=6\to(1,\ 6)$

for x = -5

$y=\dfrac{1}{2}(-5)+\dfrac{11}{2}=-\dfrac{5}{2}+\dfrac{11}{2}=\dfrac{6}{2}=3\to(-5,\ 3)$

3 0

3 years ago

Lev has 9 tens . Jim has 1 ten. They put all their tens together. Dawn puts 9 ones with the tens. What number did they make?

Olegator [25]

The answer would be 109. 9 tens is 90, and 1 ten is 10, 90+10=100 plus the 9 ones that Dawn put, 109

4 0

3 years ago