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dolphi86 [110]
3 years ago
11

8x + 10y = 8 X = -y Solve the system by substitution

Mathematics
1 answer:
snow_tiger [21]3 years ago
5 0
X=-4 y=4 i’m pretty sure
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TASAP HELP + 50 POINTS <br> Find the value of x. Show all the work
rusak2 [61]

Answer:

7

Step-by-step explanation:

im pretty sure at least. since x is on a midpoint, it'd half of 14.

6 0
3 years ago
A square and a rectangle have the same perimeter. The square has a side length of 8x units. The rectangle has a length of (10x+8
Elden [556K]
Well we know that the perimeters are equal so:
Psquare = Prectangle

we know perimeter for square is the 4 sides of same lengths added up or 4*s

the perimeter of a rectangle is the then4 sides with 2 being equal added up so 2*L + 2*W

we know that a square side equAls s and it says that s=8x. So:
Psqu = 4 * (8x) (substitute 8x for s)

we know that the rectangle L =10x + 8 and W =10. So
Prect = 2 *(10x + 8) + 2 * (10)

we know :
Prect = Psqu so:
4 * (8x) =2 *(10x + 8) + 2 * (10)
32x = 20x + 16 + 20
12x = 36
x = 3

So if x equals 3 we can sub x in for square perimeter
Psqu = 4 *(8 * 3)
P = 4 * 24
P = 96

we can check this with rectangle perimeter
P = 2 *(10 * 3 + 8) + 2 *10
P = 2 * 38 + 20
P = 96
7 0
4 years ago
The temperature at 5 p.m. is 20°F. The temperature at 10 p.m. is -5°f. How many degrees did the temperature fall?
NARA [144]

Hello!

You don't have to worry about the time when the temperature drops.

I believe your answer is 25°F.

If it is 20°F outside, then it takes 20°F to drop the zero. Now, since we are at zero now, and we are trying to get to -5°F. Then all we have to do is add 5 plus 20 and that is 25°F.

I hope it helps!


6 0
3 years ago
The interior angles of a triangle have measures k°, 27°, and 10°.<br><br> What is the value of k?
NikAS [45]

Hey!

Hope this helps...

~~~~~~~~~~~~~~~~~~~~~

Assuming that the sum of all the angles must equal 180°

180 - (27+10) = k

180 - 37 = k

k = 143°

6 0
4 years ago
Which of the following sentences correctly keeps a consistent verb tense?
Reika [66]

Answer:  b

He jumped out of the airplane and deploying his parachute.

Step-by-step explanation: The first sentence because the verbs keep a -Ed ending, signifying the last tense through the whole sentence

4 0
3 years ago
Read 2 more answers
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