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3 years ago

The sum of two numbers is 53 and the difference is 11

Mathematics

1 answer:

Olenka [21]3 years ago

7 0

Answer:

Y = 21 [Small number].

X = 32 [Big number].

Step-by-step explanation:

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8 divide 2 equals n

GarryVolchara [31]

Answer:

Me no good at math :(

Step-by-step explanation:

I big dumb

7 0

3 years ago

Read 2 more answers

Work out the surface area of a cylinder when the height = 18cm and the volume = 1715cm cubed

lara [203]

Answer:

813.4 cm² (nearest tenth)

Step-by-step explanation:

Volume of a cylinder

$\sf V=\pi r^2 h \quad\textsf{(where r is the radius and h is the height)}$

Given:

h = 18cm
V = 1715 cm³

Use the Volume of a Cylinder formula and the given values to find the radius of the cylinder:

$\implies \sf 1715=\pi r^2 (18)$

$\implies \sf r^2=\dfrac{1715}{18 \pi}$

$\implies \sf r=\sqrt{\dfrac{1715}{18 \pi}$

Surface Area of a Cylinder

$\sf SA=2 \pi r^2 + 2 \pi r h \quad\textsf{(where r is the radius and h is the height)}$

Substitute the given value of h and the found value of r into the formula and solve for SA:

$\implies \sf SA=2 \pi \left(\sqrt{\dfrac{1715}{18 \pi}\right)^2 + 2 \pi \left(\sqrt{\dfrac{1715}{18 \pi}\right)(18)$

$\implies \sf SA=2 \pi \left(\dfrac{1715}{18 \pi} \right) + 36 \pi \left(\sqrt{\dfrac{1715}{18 \pi}\right)$

$\implies \sf SA=\dfrac{1715}{9} + 36 \pi \left(\sqrt{\dfrac{1715}{18 \pi}\right)$

$\implies \sf SA=813.3908956...$

Therefore, the surface area of the cylinder is 813.4 cm² (nearest tenth)

8 0

2 years ago

Read 2 more answers

What is the answer to 3.2+10m=7.58 in algebra

laiz [17]

.438
rounded to nearest tenth = .4
rounded to nearest hundredth = .44

6 0

3 years ago

Read 2 more answers

Line AB contains points A (−6, 3) and B (2, −5). Line AB has a slope that is

nirvana33 [79]

Slope of a line contatining the points (x1,y1) and (x2,y2) is
(y2-y1)/(x2-x1)

so slope between (-6,3) and (2,-5) is
(-5-3)/(2-(-6))=(-8)/(2+6)=-8/8=-1

the slope is -1

8 0

3 years ago

Read 2 more answers

Caroline, Colin & Sarah share some money.

aev [14]

Answer:

Colin gets $\frac{2}{3}$

Step-by-step explanation:

One part is excluded in the problem. That part is:

"Caroline gets $\frac{1}{9}$ of the money."

Solution:

If Caroline gets 1/9th, then remaining is:

$1-\frac{1}{9}=\frac{8}{9}$

Colin and Sarah share in ratio 3 is to 1, that means 3 + 1 = 4 parts...

8/9th in 4 parts means, each part is:

$\frac{\frac{8}{9}}{4}=\frac{2}{9}$

We know Colin gets "3" parts of the total, each part is (2/9)th, so 3 parts would be:

$3*\frac{2}{9}=\frac{6}{9}=\frac{2}{3}$

Colin gets $\frac{2}{3}$

7 0

3 years ago