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2 years ago

Please answer number 1. Help!!

Mathematics

1 answer:

lara31 [8.8K]2 years ago

7 0

Answer:

Step-by-step explanation:

The formula of a distance from a point (x, y) to the origin:

$d=\sqrt{x^2+y^2}$

We have P(21, 35). Substitute:

$d=\sqrt{21^2+35^2}=\sqrt{441+1225}=\sqrt{1666}\approx40.8$

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Find the area of a circle with radius, r = 17cm.

Dimas [21]

Answer:

0.0908 $m^{2}$ (to 3 S.F.)

Step-by-step explanation:

Area = π $r^{2}$

π * $17^{2}$ = 907.92

= 908 $cm^{2}$

=0.0908 $m^{2}$

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2 years ago

SVETLANKA909090 [29]

Answer:

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Step-by-step explanation:

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2 years ago

Read 2 more answers

PLEASE HELP ME I NEED HELP ASAP!!!! PLEASE HELP ON A AND B

valina [46]

Answer:

Step-by-step explanation:

The opposite sides of the rectangle are of equal length.

Therefore we have the system of equations:

$\left\{\begin{array}{ccc}3y=2+x&\text{subtract 2 from both sides}\\3x=2+x+5y&\text{subtract x from both sides}\end{array}\right\\\\\left\{\begin{array}{ccc}3y-2=x&(*)\\2x=2+5y&(**)\end{array}\right$

Substitute from (*) to (**):

$2(3y-2)=2+5y\qquad\text{use distributive property}\\\\(2)(3y)+(2)(-2)=2+5y\\\\6y-4=2+5y\qquad\text{add 4 to both sides}\\\\6y=6+5y\qquad\text{subtract 5y from both sides}\\\\\boxed{y=6}$

Put the value of y to (*):

$x=3(6)-2\\\\x=18-2\\\\\boxed{x=16}$

Calculate the width and the length:

$3x = 3(16) = 48\\\\3y = 3(6) = 18$

The perimeter:

$P = 2w + 2l\\\\P = (48)(18)=864\ in$

8 0

2 years ago

Who can help me with this :)

babymother [125]

Answer:

90 im not sure tho but hopefully its correct

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1 year ago

Mrs. Fox met with 120 students. If three- quarters were girls, how many boys were at the meeting

Elan Coil [88]

Answer:30 boys

Step-by-step explanation: There are 120 students, three-fourths are girls. Nine out of twelve is equal to three fourths, if you add a zero to the end of twelve and nine you get 90 out of 120, which is how many girls there are. If you subtract 90 from 120 you get 30 or one-fourth. The number of boys is equal to one-fourth because there is only one-foutlrth left. So, there are 30 boys.

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2 years ago