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3 years ago

What’s the answer?????

Mathematics

1 answer:

Marizza181 [45]3 years ago

8 0

Answer:

Step-by-step explanation: I think A because it makes the most sence plz tell me if i'm wrong

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John and Emily are brother and sister. John has as many brothers as sisters, and Emily has twice as many brothers as sisters. Ho

spin [16.1K]

Answer:

4 boys, 3 girls

Step-by-step explanation:

brothers of John ⇒ x

sisters of John ⇒ y

John has as many brothers as sisters:

x = y

brothers of Emily ⇒ x + 1 (Emily have the same amount of brother as John, plus one (John))

sisters of Emily ⇒ y -1 (Emily have the same amount of sister as John, minus one (herself))

Emily has twice as many brothers as sisters:

2 (y-1) = x+ 1

Now we have a system of 2 equations and 2 variables

x=y (I)

2y - 2 = x + 1 (II)

____________

Replace x in equation II

2y - 2 = y + 1

2y - y = 2 + 1

y = 3

____________

Replace y in equation I

x = y = 3

That mean that John have 3 brothers plus himself, there is 4 boys in the family and John have 3 sister, so there is 3 girls in the family

8 0

4 years ago

HELP QUICKKKKKK PLEASEEE

Misha Larkins [42]

The answer is d because it 0 has more than one outcome and 0 needs to only have one outcome for it to be a function

8 0

3 years ago

Lee needed to make full length curtains to fit from the top of the window to the floor. The wall beneath the window had the heig

worty [1.4K]

Add the 2 together
2 2/3 + 2 3/4 you need a common denominator to add fractions
2 8/12 + 2 9/12 = 4 17/12 =
5 5!12 feer

7 0

3 years ago

EDIT: Sara needs to take a taxi to get to the movies. The taxi charges $3.00

My name is Ann [436]

Answer: 13.75miles
Explanation: welll...... no explanation today but...... have a great day

4 0

3 years ago

The formula for the volume of a sphere is S = 4 3 πr3, where r (in feet) is the radius of the sphere. Suppose a spherical snowba

Soloha48 [4]

Answer with Step-by-step explanation:

We are given that

Volume of sphere= $\frac{4}{3}\pi r^3$

Where r= Radius of sphere in ft

a. $r=\frac{1}{(t+1)^2}-\frac{1}{15}$

$\frac{dr}{dt}=\frac{-2}{(1+t)^3}$

$\frac{dS}{dt}=\frac{dS}{dr}\cdot \frac{dr}{dt}=4\pi r^2\frac{dr}{dt}$

$\frac{dS}{dt}=4\pi(\frac{1}{(1+t)^2}-\frac{1}{15})^2\times \frac{-2}{(1+t)^3}$

$\frac{dS}{dt}=\frac{-8\pi}{(1+t)^3}(\frac{1}{(1+t)^2}-\frac{1}{15})^2$

b.Substitute t=1

Then, we get

$\frac{dS}{dt}=\frac{-8\pi}{8}(\frac{1}{4}-\frac{1}{15})^2$

$\frac{dS}{dt}=-0.1056 ft^3/min$

6 0

3 years ago