please answer!!!
( 10 points)

[tex]\left \{ {{\frac{x}{2}-y=7 } \atop {-\frac{x}{7}+\frac{2y}{7}= -2 }} \right. <=>\left \{ {{\frac{x}{2}.2-2y=2.7} \atop {-\frac{x}{7}.7+\frac{2y}{7}.7= -2.7}} \right. <=>\left \{ {{x-2y=14} \atop {-x+2y=-14}} \right. <=>\left \{ {{0x=0} \atop {y={\frac{x}{2}-7}} \right.[/tex]

ANSWER: B

ok done. Thank to me :>

Integer solution

x= 2n, y=n-7, nEZ

real solution    or you can use inverse operation to have addition

y= x/2-7               y=x[multiplied by] 2+7

oh and for the first one the choice is A the second one im sorry im not sure

Answer:

q6 : b=-22

Q7.60×4=3h. 240=3h. 80=3h

Answer: B

Step-by-step explanation:

Answer: move the icons thing to the box in your choice I think

It takes about 4 days for the temperature to decrease by 9°F.

An equation is an expression that shows the relationship between two or more variables or numbers.

Let x represent the number of days. Given that the temperature drop decreased by 1 1/2°F each day (- 1 1/2), for it to decrease by 9°F (-9):

-1 1/2 * x = -9

-1.5x = - 9

x = 4 days

It takes about 4 days for the temperature to decrease by 9°F.

Answer:

46.9 for the first one

Step-by-step explanation:

So sorry if i'm wrong <3

Answer:

7 .375

Step-by-step explanation:

Answer:

176 Basically find whats 10% of 160 and then add that to 160 and there is your answer

Answer:

1-24 (I dont know about 2)

Step-by-step explanation:

0.5 x 24 = 12

Answer:

108 degrees

Step-by-step explanation:

The thereom for this is the interior angles (a+10) and 44 degrees add up equaling to 2a. This works for any triangle like this. So, a+10+44=2a, and we solve for a to 54 for a. Then we insert a as 54 for 2a to get 54*2=108 degrees.

Answer:

I believe it's A

Step-by-step explanation:

Answer:

i think C. 10(5x-3) is answer

Answer:

nice

Step-by-step explanation:

never gonna let you down

Answer:

7.5 and 10.5

Step-by-step explanation:

You can use this equation

1/4 of 14 and 1/4 of 10

Those two are your answers

Answer:

6 minutes

Step-by-step explanation:

every minute is 120

720/120=6

Answer:

c'estla  A

Step-by-step explanation:

I can't see the whole question. Can you plz make a whole question so I can answer it plz?

plz give me brainliest. I need a lot of those.

Answer:

26.87 miles

Step-by-step explanation:

Answer: 5 7/9

Step-by-step explanation:

Answer:

230,344,996 is my answer. Hope this could help you!

x is the days that the first team finishes the work alone (x>8)

y --------------------------second-----------------------------------------(y>8)

In a day:

⇒          [tex]\frac{1}{x}+ \frac{1}{y} =\frac{1}{8}[/tex]               (1)

If the first team works alone for two days and the second team works alone for 5 days, 5/8 of the total work still remains:

⇒          [tex]\frac{2}{x}+\frac{5}{y}=\frac{3}{8}[/tex]                (2)

(1),(2)   ⇒   [tex]\left \{ {{\frac{1}{x}+ \frac{1}{y} =\frac{1}{8}} \atop {\frac{2}{x}+\frac{5}{y}=\frac{3}{8}}} \right. <=>\left \{ {{x=16} \atop {y=24}} \right.[/tex]

It'll take the first team 16 days and the second team 24 days to finish the work alone

ok done. Thank to me :>

Answer:

$45.13

Step-by-step explanation:

what is 12% of 51.28 change 12% to a decimal by moving two spaces to left =0.12. multiple by 51.28= 6.15 that is the amount of the tip then subtract it from 51.28-6.15= $45.13 original amount before the tip.

Answer:

400

Step-by-step explanation:

The current number is 100, it doubles every ten days, and you're asking what the size will be in twenty days.

Beginning:

100 ants (ten days pass)

100 x 2 = 200

Middle:

10 of the 20 days have passed

Your new number is 200 ants

End:

200 ants (ten days pass)

Since every ten days the size doubles: 200 x 2 = 400

400 ants after 20 days

Answer:

no because order of operations requires division to be done before addition, she should divide 18252 by n then add

Step-by-step explanation:

Answer:

318125267

Step-by-step explanation:

-_-...............that is the answer

3.17 pounds of apples

   1.25 pounds of pears2

   2.56 pounds of oranges

add = 7.98

rounded = 7.42, (or anything close. I am really bad at rounding decimals)

Answer:

It's the 4th one

Step-by-step explanation:

.................................

Answer:

they r all multiple by 3

Step-by-step explanation:

2×3=6

4×3=12

6×3=18

8×3=24

10×3=30

Answer:

Step-by-step explanation:

as hotdogs (x) increase by 2 the cost (y) increases by 6

6/2 = 3/1 = 3

y = 3x

Answer:

Read below

1. 270

2. 277

Step-by-step explanation:

I'm not too sure which answer you're looking for but I'll try to answer all of them :).

First of all, we can consider them in percentage form first.

If the first sale price is marked down by 30%, it is now 70%.

For the second, the price is marked down by 20% first, so 80%.

And then another 10% on top of the 80%. 10% of 80 is 8, so the second one is marked down 80-8, or 72%.

As we can clearly see, 72% is greater than 70% so the first deal( 30% off ) would give you a cheaper price

Now we move on to the actual prices.

First one is 70% of the original price, 70% of $385 is $269.5.

Second one is 72% of original price, 72% of $385 is $277.2

Don't forget to round to the nearest dollar!

1. 270

2. 277

Hopefully this helps! If I did it wrong feel free to tell me ;-;

Also lol relatable my works due tmr and i dont feel like doing it either ://

Answer:

3 3/5 miles

Step-by-step explanation:

6 3/4 divided by 1 7/8=

3 3/5

Answer:

(-13.5, 4.5)

Step-by-step explanation: