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3 years ago

HELP PLEASE!!!

Mathematics

2 answers:

olchik [2.2K]3 years ago

7 0

Answer:

A number or number sentence that doesn't change

Step-by-step explanation:

melisa1 [442]3 years ago

6 0

Answer:

the constant of proportionality k, is the constant value of the ratio of two proportional quantities y and x

Step-by-step explanation:

k = y/x or y= kx

example : the cost of 20 books is rs. 180 how much will 15 books cost ?

a. rs. 125

b. rs. 130

c. rs. 135

d. rs. 140

answer is c. rs. 135

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Aleena expands 2xx+3-5(x-2) as 2x2+3-5x-10. Has she expanded it correctly? Please identify the mistakes and write the correct wa

Nimfa-mama [501]

The given expression is :

2xx+3-5(x-2)

We know that, $x{\cdot}x=x^2$

$=2x^2+3-5(x-2)\\\\=2x^2+3+(-5)(x)+(-5)(-2)\\\\=2x^2+3-5x+10$

Aleena expands 2xx+3-5(x-2) as 2x²+3-5x-10. She is mistaken because the sign before 10 should be +10 instead of -10. Hence, the correct expanded form is 2x²+3-5x+10. Hence, this is the required solution.

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Oxana [17]

Answer:

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3 years ago

Find the lest number which is exactly divisible by 36 & 90 Maths

prisoha [69]

Answer:

Step-by-step explanation:

You need to find the HCF of 36 and 90.

Prime factors of each:

36 = 2*2*3*3
90 = 2*3*3*5

HCF includes all prime factors of both numbers:

HCF(36, 90) = 2*2*3*3*5 = 180

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3 years ago

Read 2 more answers

Will give brainlist if correct!

Sveta_85 [38]

Answer:

A y=5

Step-by-step explanation:

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MariettaO [177]

Answer:

you will add the numerator and the denominator and or you look for lowest common factor

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