x=y-1
y=4-2x
solve by using the substitution method. pls explain how you did it too pls

Stop posting on here and do the work yourself I usually don't mind helping people but in some cases, I need to just say do it by yourself look at notes look up the answer there are a million things you can do instead of spam posting all your questions good day

Answer:

7=2+1

Step-by-step explanation:

Answer:

-15 and -2

Step-by-step explanation:

Since a negative times a negative equals a positive, but when added, still stays a negative, the factors must both be negative.

Negative Factors of 30:

-30 + -1 = -31

-15 + -2 = -17

-10 + -3 = -13

-6 + -5 = -11

The two factors of 30 that add up to -17 are -15 and -2.

Hope this helps. Have a nice day.

Answer:

£ 105.

Step-by-step explanation:

Since it is required to decrease £ 120 by 12.5%, to perform this subtraction the following mathematical operation must be performed:

100 - 12.5 = 87.5

100 = 120

87.5 = X

87.5 x 120/100 = X

10,500 / 100 = X

105 = X

Thus, decreasing £ 120 by 12.5% you get a total of £ 105.

Answer

She would have to use 2700g chocolate, 150g eggs, 300ml lemon juice and 750 g of sugar.. to make 21 potions

_____________________________

Answer:

They'll meet in 150 minutes.

Step-by-step explanation:

300÷2=150

1 foot = 1 feet

they will take

150m in 150 minutes

Answer:

x^2=25

x=5

Step-by-step explanation:

Answer:

5

Step-by-step explanation:

here's your solution

=> x^2 + 5 = 30

=> take constant to right side

=> x^2 = 30 - 5

=> x^2 = 25

=> now take square to right side it will be

converted into root

=> x = √25

=> x = 5

hope it helps

Answer: put A

Step-by-step explanation:

Put A cause 1 can’t be measure so you have to add 4 .

Answer:

imma say 45m

Step-by-step explanation:

im not sure but tell me if im wrong so i can fix it. thanks

Answer:

1 - 7

3 - 11

5 - 15

Step-by-step explanation:

pls brainliest

Answer:

0

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(5-5)/(-4-2)

m=0/-6

m=0

9514 1404 393

Answer:

  3/2 feet

Step-by-step explanation:

4 yards = (4 yd)(3 ft/yd) = 12 ft

1/8 of that is ...

  (1/8)(12 ft) = (12/8) ft = 3/2 ft = 1 1/2 ft

Answer:

The answer to no. 3 is 3

Step-by-step explanation:

No 3 is 3 x^9/2

the answer is 5/10 units

Answer:

≈ £ 4584.38

Step-by-step explanation:

Firstly, we need to find the number of litres that Mr. Leonard needs to fill up his tank:

We know that there is already 450 litres in the 1200 litre tank, so he must need 1200 - 450 = 750 litres.

I'm not quite sure what the variable p means, but I'm going to assume that p represents the number of litres and that 81.5 is the price per litre in pounds.

So:

Total price = 81.5p

Total price = 81.5(750)

Total price = £61125

We have to remember though that the question is asking for the discount and not the discounted price, so:

61125 × 7.5%

61125 × 0.075 = 4584.375

≈ £ 4584.38

Answer:

Using the Pythagorean Theorem we can see that:

[tex]9^2+40^2=1681\\\sqrt{1681}=41[/tex]

Thus, x is 41.

Answer:

25 cubic feet

Step-by-step explanation:

You need to convert all units to feet and then multiply the dimensions.

24 inches is 2 feet

30 inches is 2.5 feet

So, you would multiply 5X2X2.5= 25.

Answer:

C) add 5 to each sides.

Step-by-step explanation:

1) Add 5 to both sides.

[tex]15 + 5 = y[/tex]

2) Simplify 15 + 5 to 20.

[tex]20 = y[/tex]

3) Switch sides.

[tex]y = 20[/tex]

You need to add 5 to each sides in order to solve this equation. if you do, you'll get an answer of 20.

Answer:

-.54*8

And we get: -4.32

Step-by-step explanation:

Answer:

21

Step-by-step explanation:

sum of all numbers is 10×14=140

add the 6no=107

sum of3 no is 3×4=12

107+12=119

140-119=21

m=21

Answer:

16.75 cm

Step-by-step explanation:

The circumference of the circle is πd

The diameter is 16, so the circumference is 16π.

The minute hand goes for 20 min between 3:12 and 3:32

20 min is 1/3 of 60 min.  

Therefore, the minute hand swept 1/3 of the circumference, or 1/3(16)π

1/3(16)π = 1/3(16)(3.14) = 16.75 cm

Answer:

Triangle 1: 13.6.7

None of the triangles are right triangles.

Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

We have,

For a triangle to be a right triangle, the Pythagorean theorem must be satisfied.

So,

Applying the Pythagorean theorem.

Triangle 1:

13, 6, and 7

13² = 6² + 7²

169 = 36 + 49

169 = 85

Not true.

Triangle 2:

7, 8, and 13.

13² = 7² + 8²

169 = 49 + 64

169 = 113

Not true.

Triangle 3:

10, 11,  and 12

12² = 10² + 11²

144 = 100 + 121

144 = 221

Not true.

Triangle 4:

10, 9,  and 8

10² = 9² + 8²

100 = 81 + 64

100 = 145

Not true.

Thus,

None of the triangles are right triangles.

Learn more about the Pythagorean theorem here:

https://brainly.com/question/14930619

#SPJ6

Answer:

14km

Step-by-step explanation:

1 cm = 3.5km

4 cm = 3.5km * (4*1cm)

4 cm = 14 km

Answer:

Step-by-step explanation:

First page = 2 x 4.5 x 3 = 27 square feet.

Second page = 15 x 20 x 9 x 2 = 5400 cubic cmm

Third page = I'm sorry, I'm not really sure.

Fourth page = 52.5 cubic meters

Fifth page = I'm sorry, I'm not too sure...

Hope that helps!

Answer:1608.5

Step-by-step explanation:

Answer:

62 is the answer

Step-by-step explanation: hoped I helped

14+48=62