3 years ago

Area & Surface Area:Question 7

Mathematics

1 answer:

Monica [59]3 years ago

4 0

Answer:

208 think but I haven't done this type of stuff in a long time

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Question 12

WARRIOR [948]

Answer:

Mark's mass is 26 kg.

Step-by-step explanation:

Average mass of Jeremy, Mark and Zack = 28kg

Average mass of Jeremy and Zack = 29 kg

Let,

Jeremy's mass = x

Mark's mass = y

Zack's mass = z

Average of three of them = $\frac{Jeremy's mass + Mark's + Zack's}{3}$

28 = $\frac{x+y+z}{3}\\$

$28*3 = x+y+z\\84 = x+y+z$

x+y+z = 84 Eqn 1

$29 =\frac{x+z}{2}\\58=x+z\\$

x+z = 58 Eqn 2

Now putting value of x+z from Eqn 2 in Eqn 1

x + z + y = 84

58 + y = 84

y = 84 - 58

y = 26

Thereofore,

Mark's mass is 26 kg.

6 0

3 years ago

What is the equation of a line that passes through (-2, 4) and has a slope of 3?

devlian [24]

Equation,

$y - y1 = m(x - x1)$

Plugging in our values,

$x1 = - 2, \: y1 = 4, \: m = 3$

$y - 4 = 3(x - ( - 2))$

$y - 4 = 3(x + 2)$

So the equation is,

$y - 4 = 3(x + 2)$

6 0

3 years ago

HELP PLEASE I NEED IT ASAP IT WILL MEAN A LOT TO ME!! PLEASE

adoni [48]

Answer:

1: $x=3\sqrt{8+y^{2} }$ and the same, but its -3 instead of 3

2: x=9-3y

5 0

3 years ago

Read 2 more answers

Andre earns $12 per hour tutoring students after school. If Andre tutored for 24 hours this month, how much money did he earn th

kicyunya [14]

Answer:

188

Step-by-step explanation:

because you will use cross multiply hours over money

1/12 and 24/m cross multiply 12x24=188

188/1= 188

4 0

3 years ago

I need to know how long will it take her to frost 90 cookies?

Lubov Fominskaja [6]

Answer:

3 hours

Step-by-step explanation:

it takes you 1 hr per 30 cookies so add 1 more hour

4 0

3 years ago