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3 years ago

10

Ms Chavez bought 20 eggs at a market.she will use %30 of these eggs to make cookies. How many eggs will Ms Chavez use to make co

okies

1 answer:

Serggg [28]3 years ago

3 0

20 divided by 1/3 = 6 2/3, therefore Ms Chavez used 6 and two thirds of eggs.

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Solving systems of equations using substitution y=2x Y=-2x-4 X= Y=

podryga [215]

Answer:

hope this helps

Step-by-step explanation:

y=2x

y=-2x-4

2x+2x=-4 (grouping like terms)

4x=-4

x=-1

im sorry but im not sure what y is

6 0

3 years ago

How do you write 8.6 in scientific notation

aliina [53]

8.6

Since there is one number before the decimal, we don't have to move the decimal

8.6 * 10^0

Answer 8.6 * 10^0

7 0

3 years ago

The base of a solid is the region in the first quadrant between the graph of y=x2 and the x -axis for 0≤x≤1 . For the solid, eac

nata0808 [166]

Answer:

The volume of the solid is π/40 cubic units.

Step-by-step explanation:

Please refer to the graph below.

Recall that the area of a semi-circle is given by:

$\displaystyle A=\frac{1}{2}\pi r^2$

The volume of the solid will be the integral from <em>x</em> = 0 to <em>x</em> = 1 of area A. Since the diameter is given by <em>y</em>, then the radius is <em>y/2</em>. Hence, the volume of the solid is:

$\displaystyle V=\int_0^1\frac{1}{2}\pi \left(\frac{y}{2}\right)^2\, dx$

Substitute:

$\displaystyle V=\frac{1}{2}\pi\int_0^1\left(\frac{x^2}{2}\right)^2\, dx$

Simplify:

$\displaystyle V=\frac{1}{2}\pi \int_0^1\frac{x^4}{4}\, dx$

Integrate:

$\displaystyle V=\frac{1}{2}\pi \left[\frac{x^5}{20}\Big|_0^1\right]$

Evaluate:

$\displaystyle V=\frac{\pi}{40}\left((1)^5-\left(0\right)^5\right)=\frac{\pi}{40}\text{ units}^3$

The volume of the solid is π/40 cubic units.

4 0

3 years ago

Make a number line and show all values of x such that... x<-1 and x>1

Trava [24]

if this makes sense

Step-by-step explanation:

<_____* *________>

<---|------|-----|-----|-----|-----|----->

-2 -1. 0. 1. 2. 3

7 0

3 years ago

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The vertex of this parabola is at (-1,-3) which of the following could be its equation

Gnesinka [82]

Since these are parabolas with y being squared, the standard form of such a parabola with vertex at (h, k) is

<span>x = a(y - k)^2 + h </span>

<span>There are no steps. Just look at what is inside the parentheses and compare it to (y - k) with k = -3. </span>
<span>Then look at what is added and compare it to h = -1. </span>

<span>For instance, A has (y + 1) in parentheses. So k = -1. And it has -3 added, so h = -3. That would be a vertex at (-3, -1).</span>

6 0

3 years ago

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