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3 years ago

Please help this is my last attempt and I keep getting it wrong :( please and thank you picture is attached

Mathematics

1 answer:

Lelechka [254]3 years ago

4 0

Answer:

-7

Step-by-step explanation:

the co ordinate of f(-5) is -7

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A triangular lot has sides of 215m, 185m, and 125m. Find the measures of the angles at its corners

Vlada [557]

Answer:

The measures of the angles at its corners are $59.1\°,35.4\°,85.5\°$

Step-by-step explanation:

see the attached figure to better understand the problem

step 1

Find the measure of angle A

Applying the law of cosines

$185^{2}= 215^{2}+125^{2}-2(215)(125)cos(A)$

$2(215)(125)cos(A)= 215^{2}+125^{2}-185^{2}$

$cos(A)= [215^{2}+125^{2}-185^{2}]/(2(215)(125))$ $cos(A)=0.513953$

$A=arccos(0.513953)=59.1\°$

step 2

Find the measure of angle B

Applying the law of cosines

$125^{2}= 215^{2}+185^{2}-2(215)(185)cos(B)$

$2(215)(185)cos(B)= 215^{2}+185^{2}-125^{2}$

$cos(B)= [215^{2}+185^{2}-125^{2}]/(2(215)(185))$ $cos(B)=0.81489$

$B=arccos(0.81489)=35.4\°$

step 3

Find the measure of angle C

Applying the law of cosines

$215^{2}= 125^{2}+185^{2}-2(125)(185)cos(C)$

$2(125)(185)cos(C)= 125^{2}+185^{2}-215^{2}$

$cos(C)= [125^{2}+185^{2}-215^{2}]/(2(125)(185))$ $cos(C)=0.0784$

$C=arccos(0.0784)=85.5\°$

3 0

3 years ago

Solve -2x + 13 = -7x + 28

SpyIntel [72]

Answer:

The answer would be 46x

Step-by-step explanation:

-2x+13=11

-7x+28=35

46x

8 0

3 years ago

If a=12 b=1 what is ab+20-b

Dmitriy789 [7]

Answer:

Step-by-step explanation:

(12)(1) + 20 - (1)

12 + 20 - 1

32 - 1

4 0

2 years ago

Read 2 more answers

Expand & simplify<br> (x+1)2

stepan [7]

Answer:

(2x+2)

Step-by-step explanation:

4 0

3 years ago

Helpp what is the y- value when x equals 21? y = 650 - 16 (x)

11111nata11111 [884]

Answer:

y = 314

Step-by-step explanation:

y = 650 - 16x

y = 650 - 16(21)

y = 650 - 336

y = 314

6 0

3 years ago