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Inga [223]
3 years ago
14

Evaluate 2.5(8.6/2)-1.8

Mathematics
1 answer:
777dan777 [17]3 years ago
3 0

Step-by-step explanation:

Given the expression:

2.5( \frac{8.6}{2} ) - 1.8

Follow BODMAS rule.

always evaluate brackets first, followed by multiply or division then addition or subtraction from LEFT to RIGHT.

2.5( \frac{8.6}{2} ) - 1.8 \\  = 2.5(4.3) - 1.8 \\  = 10.75 - 1.8 \\  = 8.95

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Need help please can you give answer with working out i can not answer as it is quite gard
Elis [28]

Step-by-step explanation:

\text{Given:}\\\\AB=3x-4\\AC=2x+12\\BC=7x-2\\AB:AC=1:2\Rightarrow(3x-4):(2x+12)=1:2\\\\\dfrac{3x-4}{2x+12}=\dfrac{1}{2}\qquad\text{cross multiply}\\\\(3x-4)(2)=(2x+12)(1)\qquad\text{use the distributive property}\\\\(3x)(2)+(-4)(2)=2x+12\\\\6x-8=2x+12\qquad\text{add 8 to both sides}\\\\6x-8+8=2x+12+8\\\\6x=2x+20\qquad\text{subtract}\ 2x\ \text{from both sides}\\\\6x-2x=2x-2x+20\\\\4x=20\qquad\text{divide both sides by 4}\\\\\dfrac{4x}{4}=\dfrac{20}{4}\\\\x=5

\text{Put the value of}\ x\ \text{to}\ AC\ \text{and}\ BC:\\\\AC=2(5)+12=10+12=22\\\\BC=7(5)-2=35-2=33\\\\AC:BC=22:33=\dfrac{22}{33}=\dfrac{22:11}{33:11}=\dfrac{2}{3}=2:3

4 0
3 years ago
A boy pushes a bike with 5 newtons up a hill that is 300 meter long. How much work does he do?
siniylev [52]

Answer:

1500 J is the correct answer.

Step-by-step explanation:

5 0
3 years ago
Can someone plzzz answer these questions with showing work?
snow_lady [41]
So what you got to do is divide them perseay use a calculator for the first one 2/15 what would that be in a decimal 0.13333333333333 what ever on has 0.13333333  or something else repeating that is the one that you will circle 11/20=0.55   17/40 =0.425 1/2=0.5 so you answer would be 2/15
hope this helped
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4 years ago
What’s the area of the shaded region???
gizmo_the_mogwai [7]

Answer:

90

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Please help. no links
olga nikolaevna [1]

Answer:

144

Step-by-step explanation:

20×12=240

add 4 to 20 and 12

makes a new rectangle 24×16

24×16=384

384-240=144

7 0
3 years ago
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