Sa se gaseasca numerele a si b a caror medie aritmetica este 200 si care sunt invers proportionale cu 8 si respectiv 4,5.

Answers

Answer 1

Answer: Bonjour, (as you write in roumain)

Soient a et b les 2 nombres

(a+b)/2=200==>a+b=400

8/a=4.5/b==>16b=9a

a+9a/16=400
==> 25a/16=400
==>a=400*16/25
==>a=256
et b= 9*256/16; b=144

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How do I solve 3a=57

Answers

Divide 3 from both sides to get a=57/3 then a=19

You have to do the reverse operation to 57 so you have to do 57÷3 which is 19

Does the graph of every linear equation have an x-intercept

Answers

No.

The equation for a linear graph has the form
y = mx + b

but if m is 0, and b is not, it will not have an x-intercept.

when the length of a rectangle is X inches and the width is y inches, the perimeter is 30 inches. if the length is tripled and the width is quadrupled the perimeter becomes 102 inches. find the length and width of the original rectangle

Answers

P1=2x+2y=30

after modify them

P2=2*3x+2*4y=102

6x+8y=102

2x+2y=30 / * (-3)

-6x-6y= -90

6x+8y=102

we must add the 2 expressions

/ 8y-6y=102-90

2y=12

y=12:2

y=6

2*x+2*y=30

2x+2*6=30

2x+12=30

2x=30-12

2x=18

x=18:2

x=9

HeLP im so bad at math oof

Answers

1. 5.8 x $10^(7)$

2. 2.5 x $10^(3)$

hope that helps :)

Roman’s cat eats 30 ounces of cat food in 6 days. Which is equivalent to 30/6?A. 25/5
B. 16/4
C. 6/30
D. 24/4

Answers

Simplify 30/6 with division:

$30 / 6 = 5$

We will now look for answers that also simplify to 5:

$25 / 5 = 5$
$16 / 4 = 4$
$6 / 30 = 0.2$
$24 / 4 = 6$

The answer is A. 25/5.

Let’s see what 30/6 equals.
30/6=5
Let’s check if the options equal 5.
A.25/5=5
B.16/4=4
C.6/30=.2
D.24/4=6
So A. 25/5.

Audrey drove 200 miles in 3.5 hours. Which equation can be used to find the rate "r" at which Audrey was traveling? (A) 200=3.5r
(B) 200x3.5=r
(C) r/3.5=200
(D) 200r=3.5

Answers

A is the correct answer, because she drove r miles per hour, multiplied by 3.5 hours = the 200 miles she drove.

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