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Answered

Solve the equation. Round the answer to the nearest tenth.




2.8x = 5.1



A.1.7



B.1.8



C.1.9



D.18.2




2) 1.26x + 2.16 = 7.71




A.4.3


B.9.6


C.4.5


D.4.4



3) Which is the best estimate of x based on rounding the constants and coefficients in the equation to the nearest integer?



5.2x + 3.2 = 9.8




A.1.1


B.1.2


C.1.4


D.1.5




4) Which is the best estimate of x based on rounding the constants and coefficients in the equation to the nearest integer?



4.12(x – 7.89) = 18.12





A.12.4


B.12.5


C.12.2


D.12.6

Verified Answer :

caylus

Hello,

1) Answer B
2.8x=5.1
==>x=51/28
==>x=1.821428...
==>x≈1.8

2) Answer D
1.26x+2.16=7.71
==>x=(7.71-2.16)/1.26
==>x=4.404761904...
==>x≈4.4

3) Answer C
5x+3=10
==>x=7/5
==>>1.4

4) Answer B

4(x-8)=18
==>4x=18+32
==>x=12.5

taskmasters

1.) 2.8x = 5.1
 x = 5.1 / 2.8
 x = 1.82 ----> B

2.) 1.26x + 2.16 = 7.71
1.26x  = 7.71 -  2.16
x = 5.55 /1.26
x = 4.40 -----> D

3.) 5.2x + 3.2 = 9.8
5.2x = 9.8 - 3.2
x =6.6/5.2
x=1.27 -----> B

4.) 4.12(x – 7.89) = 18.12
4.12x – 32.51 = 18.12
4.12x  = 18.12 + 32.51
x = 12.29 -----> C

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