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Ber [7]
2 years ago
9

PLEASE HELP ME WITH GEOMETRY <3

Mathematics
1 answer:
prisoha [69]2 years ago
8 0

Answer:

answer is 25

Step-by-step explanation:

EKJ = 90, same as JHF, and EJK is 65 (because EJF =115 and 180-115=65

65+90=155

180-155=25

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Use the substitution method to solve.
lord [1]

Answer:

x = 7, y = 6

Step-by-step explanation:

solve for y for the first equation

2x + y = 20

-2x         -2x , eliminate 2x

y = 20-2x

now that we have found y, substitute the y in for the second equation

-5y = -6x + 12

-5(20-2x) = -6x + 12, we just changed y into 20-2x. remember that we are multiplying all of 20 - 2x by -5

-100+10x = -6x + 12, we multiplied everything from the parathesis  by -5

+100                 + 100, eliminate -100

10x = -6x + 112

+6x    +6x , eliminate 6x

16x = 112 , solve for x

x = 7

then y = 20 - 2x = 20 - 2*7 = 6

check:

2 * 7 + 6 = 20

20 = 20

-5 * 6 = -6 * 7 + 12

-30 = -42 + 12

-30 = -30

4 0
3 years ago
Find two consecutive whole numbers such that the sum of their squares is 221.
Law Incorporation [45]
n^2+(n+1)^2=2n^2+2n+1=221
2n^2+2n=220
n^2+n=110
n^2+n-110=0
(n-10)(n+11)=0\implies n=10,n=-11

But since n must be a whole number, we ignore n=-11. So the two integers are n=10 and n+1=11.
7 0
3 years ago
D(x)=-x+-4, find d(-4)?
suter [353]

Answer:

ive been trying to figure out your question i just cant lol. I understand why you put it on here lol. Im so sorry

Step-by-step explanation:

7 0
3 years ago
Please answer fast???????????
kherson [118]

Answer:

the second one i think

Step-by-step explanation:

5 0
3 years ago
Please help! I’m not sure what order they go in! (7th grade math)
avanturin [10]

Answer:

30: -5, -2, | 2 |, | 3 |, 8

    31: -7, -6, | 5 |, | -6 |, 8

32: -12, | 10 |, | -12 |, | -15 |, | -26 |

    33: -17, | -11 |, | 20 |, 21, | -34 |

Step-by-step explanation:

The absolute value turns a negative function into a positive one.

    Example: | -24 | would become 24

If it is positive, it stays the same.

    Example: | 14 | would simple be 14

7 0
3 years ago
Read 2 more answers
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