All categories

3 years ago

( - 7a'y + xy + 3x + 2) + (5r²y – 5cy - 6x – 7)

Mathematics

2 answers:

AlladinOne [14]3 years ago

8 0

Answer:

Adding ( - 7a'y + xy + 3x + 2) + (5r²y – 5cy - 6x – 7) will equal to

−7ya'+xy+5r2y−5cy−3x−5

LenaWriter [7]3 years ago

6 0

Answer:

heres what you need to do

Step-by-step explanation:

$1.(-7a'y+xy+3x+2)+(5r^{2}y-5cy-6x-7)\\$

combine like terms

$(-7a*2y+4x+2)=(5r^{2}*2y-5c-7)$

now combine from both sides

$(-7a*4y-2x+5r^2-5)$

this is what i got srry in advanced if i was wrong

You might be interested in

What are all the exact solutions of 2 sin^2 x- sin x = 0

alexandr1967 [171]

Factor:

2sin^2x-sinx = 0

sinx(2sinx - 1) = 0

Therefore the solutions are when:

sin x = 0
And
sinx = 1/2

So sinx = 0
is true when x = 0 and pi and all the angles coterminal with these points. Thus, the answer is x = pi*n, (where n is some integer)

sinx = 1/2
is true when x = pi/6 and 5pi/6 and the angles coterminal with these points.
Thus, the answer is x = pi/6 + 2pi*n (where n is some integer)
and x = 5pi/6 + 2pi*n (where n is some integer)

7 0

4 years ago

Read 2 more answers

Which of the binomials below is a factor of this trinomial?

Margaret [11]

$4x^2+20x-24=4(x^2+5x-6)=4(x^2+6x-x-6)\\\\=4[x(x+6)-1(x+6)]=4(x+6)(x-1)\\\\Answer:\ A)\ x-1$

6 0

3 years ago

50 is 15% of what number?

Mashcka [7]

Converting percentage to a decimal :
50%= 50 / 100 = 0.5

What is 50% of 15
=50% * 15
=0.5 * 15
=7.5

6 0

3 years ago

Find the approximate surface-area-to-volume ratio of a bowling ball with a radius of 5 inches.

Nataly_w [17]

Surface area of a ball:
S=4πr^2=4*π*5^2=100π

Volume of a circle:
V=4/3*π*r^3=4/3*π*125=(500/3)*π=165π

The approximate surface-area-to-volume ratio would be 1:1,5

6 0

4 years ago

An ice cream shop sells cones at the volume of 94.2 cubic meters they want to double the volume of the cones without changing th

marin [14]

The volume of a cone is $V=\pi r^2\frac{h}3$ where r = radius and h = height. If the cone has a volume of 94.2 cm³ (I assume you didn't mean m³ because that would be ridiculously huge) and a height of 10 cm, we can plug these values into the formula to find the radius. Don't do any rounding.

$94.2 = \pi r^2\frac{10}3 \\ 282.6 = \pi r^2 *10 \\ 28.26 = \pi r^2 \\ 8.99543738355 = r^2 \\ 2.99923946752=r$

Now we know that's going to be the radius of our <em>new </em>cone as well since we're keeping the diameter the same. The volume is going to be double 94.2 which is 188.4. Let's solve for the height.

$188.4 = \pi (2.99923946752)^2\frac{h}3 \\ 188.4 = \pi(8.99543738355)\frac{h}3 \\ 188.4 = 28.26\frac{h}3 \\ 565.2 = 28.26h \\\\ \boxed{h = 20, r\approx 3}$

5 0

3 years ago