3 years ago

Pls answer my question

Mathematics

1 answer:

Mariulka [41]3 years ago

4 0

Answer:

hope this helps you

have a great day

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A student solved z + (-0.72) = -2.5 for z using the following steps.

oksano4ka [1.4K]

Step-by-step explanation:

Z - 0.72 = - 2.5

Z = - 2.5 + 0.72 = - 1.78

Z = - 1.78

7 0

3 years ago

Sarah is saving money to buy a microscope. She has saved $25 so far. That's 1/3 of the

seropon [69]

Answer:

X = $75

Step-by-step explanation:

X=total cost

x* (1/3) =$25

multiply by 3 on both sides

x=$75

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3 years ago

A circular pond is modeled by the equation x^2 + y^2= 225. A bridge over the pond is modeled by a segment of the equation x – 7y

serious [3.7K]

$x^2+y^2=225 \\
x-7y=-75 \\ \\
\hbox{solve the second equation for x:} \\
x-7y=-75 \ \ \ |+7y \\
x=7y-75 \\ \\
\hbox{substitute 7y-75 for x in the first equation:} \\
(7y-75)^2+y^2=225 \\
49y^2-1050y+5625+y^2=225 \\
50y^2-1050y+5625=225 \ \ \ \ \ \ \ \ \ |-225 \\
50y^2-1050y+5400=0 \ \ \ \ \ \ \ \ \ \ \ \ |\div 50 \\
y^2-21y+108=0 \\
y^2-9y-12y+108=0 \\
y(y-9)-12(y-9)=0 \\
(y-12)(y-9)=0 \\
y-12=0 \ \lor \ y-9=0 \\
y=12 \ \lor \ y=9$

$x=7y-75 \\
x=7 \times 12 -75 \ \lor \ x=7 \times 9-75 \\
x=84-75 \ \lor \ x=63-75 \\
x=9 \ \lor \ x=-12 \\ \\
(x,y)=(9,12) \hbox{ or } (x,y)=(-12,9)$

The points are (9,12) and (-12,9).
The answer is A.

7 0

3 years ago

What are the coordinates for point I? Don't foget Parenthesis!

Rufina [12.5K]

Answer:

(4,3)

Step-by-step explanation:

Because I just did it.

6 0

3 years ago

Read 2 more answers

PLEASE HELP ITS URGENT DONT GUESS ILL MARK BRAINLIEST IF YOU GET IT RIGHT

ipn [44]

Answer:

circumference = 301.44

area =7,234.56

Step-by-step explanation:

The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle.

96 x 3.14 = 301.44

area = 3.14r^2

radius = d/2

radius = 48

3.14(48^2)

area =7,234.56

4 0

3 years ago

Pls answer my question ​

Pls answer my question