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3 years ago

What is 1 3/4 - 5/6r =8/3

1 answer:

6 0

1 3/4 - 5/6r = 8/3

-5/6r + 7/4 = 8/3

-5/6r +7/4 - 7/4 = 8/3 -7/4
-5/6r = 11/12

(6/-5)*(-5/6r)=(6/-5)*(11/12)
=-11/10

r = -1 1/10

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If 8 pizzas cost $72,how much will 15 pizzas cost

Lelu [443]

Answer: $135

Explanation: To find how much 15 pizzas will cost, first we have to find out how much just one pizza will cost. To do this, you have to divide both the number of pizzas (8) and also the price for those 8 pizzas ($72) by the number of pizzas (8 again). When you do this you get the price of one pizza. Then you multiply the price of one pizza by the amount of pizzas you actually need to find the value for (15). This is a lot to explain but don't lose hope! Let me show you step by step and it'll make more sense.

Step 1) Divide both the amount of pizzas and the cost of that many pizzas

8 ÷ 8 = 1

72 ÷ 8 = 9

This means that one pizza costs 9 dollars.

Step 2) Multiply the cost of one pizza by 15 (the amt of pizzas you need to find the cost for)

15 × 9 = 135

135 is the cost for 15 pizzas. I hope this helps you!

6 0

2 years ago

Read 2 more answers

Can somebody help me on this

olchik [2.2K]

Answer:

Subtract 4 from both sides

7 0

3 years ago

Read 2 more answers

The equation of a straight line can be written in the

Bond [772]

Answer:

see explanation

Step-by-step explanation:

Given

(a)

3x + 2y - 8 = 0 ( subtract 3x - 8 from both sides )

2y = - 3x + 8 ( divide the terms by 2 )

y = - $\frac{3}{2}$ x + 4

(b)

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = - $\frac{3}{2}$ x + 4 ← is in slope- intercept form

with slope ( gradient) m = - $\frac{3}{2}$ and

(c)

c = 4

That is crosses the y- axis at (0, 4 )

8 0

3 years ago

Which two numbers add up to -24 and multiple to -24

Aleks [24]

X + y = -24
xy = -24

$xy = -24$
$\frac{xy}{x} = \frac{-24}{x}$
$y = \frac{-24}{x}$

$x + y = -24$
$x + \frac{-24}{x} = -24$
$\frac{x^{2}}{x} + \frac{-24}{x} = -24$
$\frac{x^{2} - 24}{x} = -24$
$-24x = x^{2} - 24$
$0 = x^{2} + 24x - 24$
$x = \frac{-(24) \± \sqrt{(24)^{2} - 4(1)(-24)}}{2(1)}$
$x = \frac{-24 \± \sqrt{576 + 96}}{2}$
$x = \frac{-24 \± \sqrt{672}}{2}$
$x = \frac{-24 \± 4\sqrt{42}}{2}$
$x = -12 \± 2\sqrt{42}$
$x = -12 \± 2(6.5)$
$x = -12 \± 13$
$x = -12 + 13$ $or$ $x = -12 - 13$
$x = 1$ $or$ $x = -25$

  x + y = -24    or      x + y = -24
  1 + y = -24 or -25 + y = -24
- 1   - 1 + 25 + 25
y = -25     or    y = 1
  (x, y) = (1, -25) or (x, y) = (-25, 1)

The two numbers that add up to 24 are the numbers 1 and -25.

x + y = -24
xy = -24

$xy = -24$
$\frac{xy}{x} = \frac{-24}{x}$
$y = \frac{-24}{x}$

$x + y = -24$
$x + \frac{-24}{x} = -24$
$\frac{x^{2}}{x} + \frac{-24}{x} = -24$
$\frac{x^{2} - 24}{x} = -24$
$-24x = x^{2} - 24$
$0 = x^{2} + 24x - 24$
$x = \frac{-(24) \± \sqrt{(24)^{2} - 4(1)(-24)}}{2(1)}$
$x = \frac{-24 \± \sqrt{576 + 96}}{2}$
$x = \frac{-24 \± \sqrt{672}}{2}$
$x = \frac{-24 \± 4\sqrt{42}}{2}$
$x = -12 \± 2\sqrt{42}$
$x = -12 \± 2(6)$
$x = -12 \± 12$
$x = -12 + 12$ $or$ $x = -12 - 12$
$x = 0$ $or$ $x = -24$

  x + y = -24    or      x + y = -24
  0 + y = -24 or -24 + y = -24
- 0 - 0 + 24 + 24
y = 24    or    y = 0

The two numbers that multiply to -24 are the numbers 24 and 0.

7 0

3 years ago

Where x=-7 what does y=?

densk [106]

Answer:The "+7" indicates that there will be a y-intercept at 7. Therefore, you can plot a point at (0,7).

3 0

3 years ago