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3 years ago

The product of 7,x, and y is represented by the expression 7xy. If the value of x is negative, what

Mathematics

2 answers:

Sergio [31]3 years ago

8 0

Answer:

it must be negative

Step-by-step explanation:

7xy = a positive number

7 is positive.

x is a negative number.

y must be negative for 7xy to be positive.

(+) * (-) * (-) = +

The product of two negative numbers is positive.

Sphinxa [80]3 years ago

5 0

Answer:

In the expression of 7xy, if x is negative, then y must also be negative for the product to be positive.

Let me know if this helps!

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What factors of 72 add to 17

Naddik [55]

72 = 8*9
8 + 9 = 17

The factors you're looking for are 8 and 9.

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3 years ago

Read 2 more answers

Maribel thinks the tens digit goes up by 1 in these numbers. Do you agree?

podryga [215]

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3 years ago

A rectangle is inscribed in a right isosceles triangle, such that two of its vertices lie on the hypotenuse, and two other on th

Rufina [12.5K]

Answer:

Part 1) The base is $25\ in$ and the height is $10\ in$

Part 2) The base is $7.5\ in$ and the height is $18.75\ in$

Step-by-step explanation:

case 1) Right isosceles triangle of the left

Let

x------> the base of the rectangle

y----> the height of the rectangle

Remember that

In a right isosceles triangle the lengths of the legs of the triangle is the same

$y+x+y=45$

$2y+x=45$ ----> equation A

$\frac{x}{y} =\frac{5}{2}$

$x=2.5y$ -----> equation B

substitute equation B in the equation A

$2y+2.5y=45$

$4.5y=45$

$y=10\ in$

Find the value of x

$x=2.5(10)=25\ in$

case 2) Right isosceles triangle of the right

Let

x------> the base of the rectangle

y----> the height of the rectangle

Remember that

In a right isosceles triangle the lengths of the legs of the triangle is the same

$y+x+y=45$

$2y+x=45$ ----> equation A

$\frac{y}{x} =\frac{5}{2}$

$y=2.5x$ -----> equation B

substitute equation B in the equation A

$2(2.5x)+x=45$

$6x=45$

$x=7.5\ in$

Find the value of y

$y=2.5(7.5)=18.75\ in$

3 0

3 years ago

Ava paid $4.90 for 2.5 pounds of walnuts. what is the cost of one pound of walnutKieth has a box of 416 crayons the he wants to

Nadusha1986 [10]

Okay so for the first one all you have to do is divide 4.90 by 2.5 and get 1.96. So your answer for the first on is $1.96.

For the second one you just have to divide 416 by 13 and you get 32. So each friend gets 32 crayons.

Hope this helped you (;

4 0

3 years ago

Write the point-slope form, then use that to write the slope-intercept form of the equation

Mashcka [7]

For a line with slope m that passes through a point $(x_1, y_1)$ , the point-slope form equation is the following.

$y-y_1=m(x-x_1)$

We have a given slope of 4 and a given point of (7,5). Now, plug in the values.

$\boxed{y-5=4(x-7)}$

That is the point-slope form of the line. Now, let's change this into slope-intercept form. Slope-intercept form looks like the following:

$y=mx+b$

Where m is the slope and b is the y-intercept. Let's do some algebra on our point-slop form equation to change it into slope-intercept form.

$y-5=4(x-7)$

This was our equation. Let's use the distributive property on 4(x-7).

$y-5=4x-28$

Now, add 5 to both sides of the equation

$\boxed{y=4x-23}$

This the slope-intercept form of the line. Thus, we have solved for both the point-slope form and the slope-intercept form. Hope this helps! :)

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3 years ago