4 years ago

Example and answer,will give brain

Mathematics

1 answer:

Yuri [45]4 years ago

5 0

Answer:

b) -2/5

Step-by-step explanation:

b is -2/5 because its negative and goes down at a rate of 0.4 or 2/5

a , ummmm IDK that, sorry

Brainliest, crown to me

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-4/9 rational ,irrational ,integer ,whole number ,or natural number

klasskru [66]

It is rational because it can be going forever in decimal form

3 0

3 years ago

Use substitution to show that 9+6(10-7x) is equivalent to 69-42x.

Over [174]

Answer:

hope this helps

Step-by-step explanation:

9+6(10-7x)

=9+60-42x

=69-42x

5 0

3 years ago

5-2x2=-15 what is the answer

liq [111]

Answer:

{-5-2*x^2-(-15)=0}

Step-by-step explanation:

That's the answer i believe??

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3 years ago

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In four years daniel will be 30 years old how old is he now

kotegsom [21]

26 years old .

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3 years ago

An open box is made from a 40-cm by 80-cm piece of tin by cutting a square from each corner and folding up the edges. The area

tamaranim1 [39]

Answer:

x=2

Step-by-step explanation:

let x be the edge length of the square removed at each corner;

Hence the area of the base is:

$A_b(80-2x)(40-2x)=2736\\\\3200-160x-80x+4x^2=2736\\\\\\4x^2-240x+3200=2736\\\\4x^2-240x+464=0\\\\x^2-60x+116=0$

Using the quadratic equation formula, or completing the square, x, or length of a side of one of the squares is x=2 or x=58

#Given that x=58 is larger than 40cm, the side length is x=2

6 0

3 years ago