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2 years ago

Can someone please please please help me? I need this to be correct or else I’m gonna be grounded for the rest of the summer…

Mathematics

2 answers:

mixas84 [53]2 years ago

6 0

Answer:

Step-by-step explanation:

42-14=28

iogann1982 [59]2 years ago

6 0

Answer:

A. 42 and 14

Step-by-step explanation:

first number = x

second number = y

x - y = 28

3x - x = 28

(y is now x because it says the second number is whatever x was, but three times less)

x = 14

3(14) - (14) = the original number, 28

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Determine whether each equation represents a proportional relationship.

likoan [24]

Answer:

Proportional Relationship: I Not a Proportional Relationship:

y=1.6x I y=3/(4x)

y=x I y=2x+1

y=12x . I y=3+x

Explanation:

I took the test and that's how i got these answers.

8 0

3 years ago

6.5 kg to 3.9 kg, what was the percent decrease

igomit [66]

Answer: 40%

Step-by-step explanation:

Given,

Initial mass = 6.5kg

final mass = 3.9kg

So, Change in mass = initial mass - final mass

= 6.5 - 3.9

= 2.6 kg

and,

Change in percentage of mass = $\frac{change in mass}{original mass} * 100$

Change in percentage of mass = $\frac{2.6}{6.5} * 100$

= 40

6 0

3 years ago

Simplifing inside parentheses first

yanalaym [24]

Answer:

A^8/b^10

Step-by-step explanation:

first do the parentheses first

a^4/b^5

squared

a^8/b^10

8 0

3 years ago

-3x^2-168 solve the quadratic equation

vlabodo [156]

Answer:

$x=+2i\sqrt{14}\ \ \,x=-2i\sqrt{14}$

Step-by-step explanation:

$-3x^2-168$

The first step in solving this equation is the factor, remove a factor that both the quadratic and constant term have in common. In this case, such a term would be (-3),

$-3(x^2+56)$

Now set the equation equal to zero so that one can use the zero product property. The zero product property states that any number times zero equals zero.

$-3(x^2+56)=0$

Solve, use inverse operations,

$x^2+56=0$

$x^2=-56$

One cannot take the square root of a negative number and get a real result, thus the result is an imaginary number.

$x=\sqrt{-56}$

Simplify, remove whole factors from under the radical,

$x=+-2i\sqrt{14}$

6 0

2 years ago

Please help I will give brainliest!

mina [271]

Answer:

Step-by-step explanation:

Let's look at the first option in this multiple-choice; 18. 18 is divisible by 18, but is not divisible by 35, so that answer isn't right.

What about 3? 3 is divisible by 18, but it isn't divisible by 35. Let's move on.

7 is divisible by 35, but it isn't divisible by 18.

1 is universally divisible by anything. That doesn't mean it is the greatest common factor, but in this case it is, because none of the other options are a factor of both numbers given. Therefore, 1 is divisible by 18.

7 0

3 years ago