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Gre4nikov [31]
3 years ago
12

Using elimination solve x+4y=-8 and x-4y=-8

Mathematics
1 answer:
Vika [28.1K]3 years ago
8 0
Subtract the two equations: 8y=0 
y=0
x=-8
You might be interested in
Fast food hamburgers have high amounts of cholesterol. Two McDonald’s Quarter Pounders and three Burger King Whoppers contain a
Anastasy [175]

Answer:

McDonald’s Quarter Pounders = 67 mg of cholesterol

Burger King Whoppers = 87 of cholesterol

Step-by-step explanation:

McDonald’s Quarter Pounders = m

Burger King Whoppers = b

2m + 3b = 395

3m + 1b = 288

3m + b = 288

b = -3m + 288

2m + 3b = 395

2m + 3(-3m + 288) = 395

2m - 9m + 864 = 395

- 7m + 864 = 395

- 7m/7 = -469/7

-m = -67

-m/-1 = -67/-1

m = 67

2m + 3b = 395

2(67) + 3b = 395

134 + 3b = 395

3b = 395 - 134

3b = 261

3b/3 = 261/3

b = 87

Check: m = 67; b = 87

2m + 3b = 395

3m + 1b = 288

2m + 3b = 395

2(67) + 3(87) = 395

134 + 261 = 395

395 = 395

3m + 1b = 288

3(67) + 1(87) = 288

201 + 87 = 288

288 = 288

(Probs too late but welp :p)

5 0
3 years ago
If the temperature outside is 60 degrees at 6 pm and then drops by 15% at 10 pm, what is the temperature at 10 pm?
Zolol [24]

Answer:

51 degrees

Step-by-step explanation:=Given data

Temperature at 6pm = 60 degrees

percent drop= 15%

= 15/100*60

=0.15*60

=9 degrees

Hence the temperature at 10 pm is 60-9= 51 degrees

6 0
2 years ago
Which of the following does not dissolve in water​
xeze [42]

Answer:

mud

Step-by-step explanation:

4 0
2 years ago
How to solve this equations
Paha777 [63]
I do not know   jhjgjhgmfkjcvhjvciufhkjhjkbhfbhjfhb

6 0
2 years ago
I have attached the question IF ANSWERED WITHIN 10 MINUTES I WILL AWARD BRAINLIEST
Reil [10]
<3 +<4= 180
<3+25+52=180 from here <3=180-77=103
using this in first equation: 103+<4=180  <4=180-103=77
as you can see <4=77 which is the the sum of 25+52
8 0
3 years ago
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