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Lemur [1.5K]
3 years ago
13

(05.02)

Mathematics
1 answer:
MaRussiya [10]3 years ago
6 0

Answer:

Answer choice a.

Step-by-step explanation:

Let's do part of the work of solving the given system:

6x + 2y = −6

3x − 4y = −18

Multiply the first equation by 2 so as to make the coefficient of y = to 4:

12x + 4y = -12

Combine this result with the second equation:

12x + 4y = -12

3x − 4y = −18

------------------------

 15x = -30

Note that these results are precisely the same as the equations in Answer Choice a.

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5. A gallon of paint covers 300 square feet.
Vladimir79 [104]

Step-by-step explanation:

wall 25×12=300

2 walls = 600

wall2 20×12=240

2 wall2= 480

600+480= 1080 sq ft

3 0
3 years ago
At a pizza Parlour, you can order single, double, triple cheese in the crust. You also have the option to include ham, olives, p
ki77a [65]

Answer:

381 different types of pizza (assuming you can choose from 1 to 7 ingredients)

Step-by-step explanation:

We are going to assume that you can order your pizza with 1 to 7 ingredients.

  • If you want to choose 1 ingredient out of 7 you have 7 ways to do so.
  • If you want to choose 2 ingredients out of 7 you have C₇,₂= 21 ways to do so
  • If you want to choose 3 ingredients out of 7 you have C₇,₃= 35 ways to do so
  • If you want to choose 4 ingredients out of 7 you have C₇,₄= 35 ways to do so
  • If you want to choose 5 ingredients out of 7 you have C₇,₅= 21 ways to do so
  • If you want to choose 6 ingredients out of 7 you have C₇,₆= 7 ways to do so
  • If you want to choose 7 ingredients out of 7 you have C₇,₇= 1 ways to do so

So, in total you have 7 + 21 + 35 + 35 + 21 +7 + 1 = 127  ways of selecting ingredients.

But then you have 3 different options to order cheese, so you can combine each one of these 127 ways of selecting ingredients with a single, double or triple cheese in the crust.

Therefore you have 127 x 3 = 381 ways of combining your ingredients with the cheese crust.

Therefore, there are 381 different types of pizza.

3 0
3 years ago
Find the 7th term of a geometric sequence with t1=5 and r = -2.
Shtirlitz [24]
An=Asub1(r)n-¹
=5(-2)7-¹
=5(64)
A7=320
4 0
3 years ago
What shows the equation 12x +4y=140 in general form
baherus [9]
If general form means y=mx+b form then your answer would be B
3 0
3 years ago
When you subtract one square number from another the answer is 3 what are the two square numbers
dimulka [17.4K]
The numbers are 1 and 2

1 squared = 1 because 1 x 1 = 1
2 squared = 4 because 2 x 2 = 4

4 - 1 = 3
5 0
3 years ago
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