3 years ago

If a+9a−3 > 2, which of the following could be a value of a?

Mathematics

1 answer:

natali 33 [55]3 years ago

7 0

Answer:

Any of these, given the equation

Step-by-step explanation:

a+9a−3 > 2

Combine like terms

10a−3 > 2

Add 3 to each side

10a−3+3 > 2+3

10a > 5

Divide each side by 10

10a/10 >5/10

a >1/2

You might be interested in

Who can help me with this for algebra 2

Anuta_ua [19.1K]

The answer to this equation is

x= 1, -3

7 0

2 years ago

an isosceles triangle has congruent sides of 20cm. the base is 10cm. find the height of the triangle.

dolphi86 [110]

Answer:

$\large\boxed{A_\triangle=25\sqrt{15}\ cm^2}$

Step-by-step explanation:

Look at the picture.

The formula of an area of a triangle:

$A_\triangle=\dfrac{bh}{2}$

b - base

h - height

We need a length of a height.

Use the Pythagorean theorem:

$leg^2+leg^2=hypotenuse^2$

We have:

$leg=5,\ leg=h,\ hypotenuse=20$

Substitute:

$5^2+h^2=20^2$

$25+h^2=400$ subtract 25 from both sides

$h^2=375\to h=\sqrt{375}\\\\h=\sqrt{(25)(15)}\\\\h=\sqrt{25}\cdot\sqrt{15}\\\\h=5\sqrt{15}\ cm$

Calculate the area:

$A_\triangle=\dfrac{(10)(5\sqrt{15})}{2}=\dfrac{50\sqrt{15}}{2}=25\sqrt{15}\ cm^2$

8 0

3 years ago

Iron has a density of 7.9 g/cm³. Gold has a density of 19.3 g/cm³.

alexandr402 [8]

Density = m/v
3.86kg=3860g
d= 3860/200
= 19.3g/cm^3
therefore it is gold.

7 0

1 year ago

What is the slope-intercept equation for the line below?

Vsevolod [243]

Can you please show us the graph ?

5 0

3 years ago

Read 2 more answers

Ay anyone willing to help me with my work kinda lost

kirill115 [55]

Okaayyy

Set B has the greater mode

7 0

2 years ago