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NARA [144]
3 years ago
15

How to you solve x2 -20x -17 = -53

Mathematics
1 answer:
Gennadij [26K]3 years ago
7 0

Answer:

solve for x

x=2

Step-by-step explanation:

x2-20x-17=-53

reorder like terms x2= 2x       2x=20x-17=-53

collect like terms 2x-20x=-18x           -18x-17=-53

move constant to the right hand side and change its sign   -18x=-53+17

calculate the sum -53+17= -36         -18x=-36

divide both sides by -18  -18x÷-18= x        -36÷-18=2

x=2

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Geometry and perimeter help plz :(
Novay_Z [31]

Answer:

11.)4.79mi

12.)8cm

13.)10.6km

14.)5.93

15.)2yd

16.)5.41in

17)2y

18)2m

19)11.8yd

20)4.51km

Step-by-step explanation:

11.)15.8x2=31.6 31.6/6.6=4.79

12.)64/8=8

13.)26x2=54 54/4.9=10.6

14.)8.6x2=17.2 17.2/5.93

15.)2/1=2

16.)29.2/5.4=5.41

17)4/2=2

18)10/5=2

19)139.2/11.8=11.8

20)20.3/4.5=4.51

3 0
3 years ago
The length of a rectangular piece of land is 60 yard more than two times its width. The perimeter is 540 yard. Find its dimensio
babunello [35]

Answer:

l=200 yard

w=70 yard

Step-by-step explanation:

let  width =w

length l=2w+60

then perimeter P=2(l+w)=2(2w+60+w)=540

3w+60=270

3 w=270-60=210

w=70

l=2*70+60=200

4 0
3 years ago
Claire accepted a new job at a company with a contract guaranteeing annual raises. Claire will get a raise of $2000 every year a
Tatiana [17]

Answer:

s(n)= 80,000+ 2,000n

Step-by-step explanation:

she has a starting salary of $80,000 and gets a $2,000 raise each year. Say she has worked there for 5 years, multiple 2,000 by 5 and add 80,000.

8 0
3 years ago
Read 2 more answers
Calculate the average speed of a complete round trip in which the outgoing 300 km is covered at 97 km/h, followed by a 1.0-h lun
gizmo_the_mogwai [7]

Answer:

Average Speed  is 65 km/hr

Step-by-step explanation:

To get the average speed,  first we have to calculate the time spent in the round trip .

Speed= Distance/ time

So,  Time= Distance/Speed

Time Outgoing= 300km/ 97km/hr

Time Outgoing=3.0927 hr

Time lunch break =1 hr

Time return= 300km/ 58km/hr

Time Outgoing=5.1724 hr

Total= 3.0927 hr+1 hr+5.1724 hr=9.2651

To get average speed,  we have to divide all the distance by the time it took al the trip.

Average Speed= Distance/ time

Average Speed= 600km/9.2651 hr= 64,76 km/hr

Average Speed=64,76 km/hr ≅ 65km/hr

3 0
3 years ago
The difference between the measures of two supplementary angles is 92 degrees°. determine the measures of the two angles.
zalisa [80]
Supplementary angles add up to 180 degrees

x + y = 180
x - y = 92
---------------add
2x = 272
x = 272/2
x = 136 <=== this is one angle

x + y = 180
136 + y = 180
y = 180 - 136
y = 44 <=== this is ur other angle
5 0
3 years ago
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