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2 years ago

Case Study 2

Mathematics

1 answer:

ICE Princess25 [194]2 years ago

4 0

Answer:

good for them i think

Step-by-step explanation:

this doesnt make any sense

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Evaluate the expression.<br>(21÷7) +6 + 3³

spin [16.1K]

Answer: 36.
Solve in order of PEMDAS - parentheses, exponents, multiplication, division, addition and subtraction. 21/7= 3. 3^3 is 3*3*3=27. 3+ 6 + 27= 36.

8 0

3 years ago

Work out the value of z, given that x+y=42 and x/13=y/8=z/9.

Andru [333]

Answer:

z = 18

x = 26 and y = 16

Step-by-step explanation:

Given:

$x + y = 42$

$\dfrac{x}{13}=\dfrac{y}{8}=\dfrac{z}{9}$

Rewrite $x + y = 42$ to make $y$ the subject:

$\implies y=42-x$

Substitute this into $\dfrac{x}{13}=\dfrac{y}{8}$ :

$\implies \dfrac{x}{13}=\dfrac{42-x}{8}$

Cross multiply:

$\implies 8x=13(42-x)$

$\implies 8x=546-13x$

$\implies 21x=546$

$\implies x=26$

Substitute found value of x into $x + y = 42$ and solve for y:

$\implies 26 + y = 42$

$\implies y=16$

Substitute found value of y into $\dfrac{y}{8}=\dfrac{z}{9}$ and solve for z:

$\implies \dfrac{16}{8}=\dfrac{z}{9}\\\\\implies 2=\dfrac{z}{9}\\\\\implies 18=z$

4 0

2 years ago

Rate, how many hours will it take the ship to travel 100 miles?<br> hours

kifflom [539]

Answer:

I would say about 5 or 6 hours.

Step-by-step explanation:

3 0

3 years ago

Can we do a zoom lol.

tatiyna

Answer:

No‏‏‎

Step-by-step explanation:

Ransom letters so I can hit 20 characters

4 0

3 years ago

Read 2 more answers

Help help please help help

yuradex [85]

Answer:

The range is 5.

Step-by-step explanation:

You can deduce this by concluding all other statements are true, or by calculating the range. 10 - 1 = 9

3 0

3 years ago