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son4ous [18]
3 years ago
11

Can someone give me a hand

Mathematics
1 answer:
crimeas [40]3 years ago
7 0
Subtract "this" from "that" ⇒ "that" - ("this")
12x² + 3xy - 5y² - (8x²  + 3xy + 4y²)
12x² + 3xy - 5y² + -8x² - 3xy - 4y²        Subtraction means add the opposite
Now Combine like terms:
12x² - 8x² = 4x²
3xy - 3xy = 0
-5y² - 4y² = -9y²
ANSWER: 4x
² - 9y²
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Pizza Land delivered 144 pizzas in 8 hours on Saturday at that rate, how many pizzas can they deliver in 3 hours
Naya [18.7K]

Answer:

54

Step-by-step explanation:

144 divided by 8 is 18

so that means that their hourly rate 18 pizzas per hour

so multiply 18 by 3 and get 54

4 0
3 years ago
If it takes 1,800 foot- pounds of work to push a rock fifteen feet, what amount of force was used?
ella [17]

Answer:

120 lbs

Step-by-step explanation:

Work = force * distance

1800 ft-lb = force * 15 ft

force = 1800 ft-lb / 15 ft

=1800/15 ft-lb/ft

=120lbs

6 0
4 years ago
7
Valentin [98]

9514 1404 393

Answer:

  A.  -1 ≤ x ≤ 3

Step-by-step explanation:

The range is the horizontal extent of the graph--the set of x-values for which the function is defined. Here, the graph extends from x = -1 to x = 3, with both end points included. The range is ...

  -1 ≤ x ≤ 3

5 0
3 years ago
Alan bought a used bicycle for $115. After reconditioning it, he added 225% markup and then advertised it for sale. What is the
sveta [45]

Answer:

$258.75

Step-by-step explanation:

225% of 115 is 258.75, therefore the markup is $258.75.

4 0
3 years ago
Read 2 more answers
Jessica is baking a cake. The recipe says that she has to mix 96 grams of sugar into the flour. Jessica knows that 1 cup of this
Rudik [331]
1 cup = 128 grams
X cups = 96 grams

Cross multiply
128X = 1*96
X=96/128 cups = 6/8 = 3/4 cups.

If she has already added 1/2 cups, then she needs to add (3/4-1/2)=1/4 cup more sugar.

Also please remind her to do the calculations before adding ingredients to avoid ruining a recipe.
7 0
4 years ago
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