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3 years ago

Write a proportion that could be used to solve for each variable. Then solve.

1 answer:

5 0

16 walls in 40 hours
3 walls in h hours

16/40 = 3/h

16h = 40(3)
16h = 120
h=120/16
h=7.5

answer: 3 walls in 7.5 hours

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stepladder [879]

Answer:

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2 years ago

Which expressions are polynomials?

cupoosta [38]

The expressions that are polynomial are:

6 + w

$2x^4 - y$

z + 1

Solution:

A polynomial is an expression with variables and coefficients with the operations of addition, subtraction, multiplication, and non-negative integer exponents of variables

1) 6 + w

Here "w" is a variable, hence it is a polynomial expression

$2)\ 2x^4 - y$

This is a polynomial, since it has variables and coefficients and variable with non negative exponent

3) z + 1

This is also a polynomial with variable "z" and has addition operation

$4)\ y^2 - y\sqrt{3} + 4$

Since it has root so it is not a polynomial

6 0

3 years ago

Read 2 more answers

A function is a mathematical rule that.....

Elodia [21]

Answer:

Step-by-step explanation:

A function can be graphed as a straight line, as long as it isn't vertical.

5 0

3 years ago

If the instantaneous velocity of an object is zero, then its acceleration must be:

Nuetrik [128]

Hi I think it would be zero sense the object is in one spot. I hope I helped

6 0

3 years ago

Rectangle JKLM is reflected across the x-axis and then the y-axis. The point I was

Sunny_sXe [5.5K]

Reflection involves mirroring a point over a line.

When L is reflected across the x and y axes, the new coordinates are (7,3)

Given that:

$(x,y) \to (-7,-3)$

When a point is reflected across the x-axis, the rule is:

$(x,y) \to (x,-y)$

So, we have:

$(-7,-3) \to (-7,3)$

When a point is reflected across the y-axis, the rule is:

$(x,y) \to (-x,y)$

So, we have:

$(-7,3) \to (7,3)$

Hence, the new coordinates of L are (7,3)