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3 years ago

Was the ratio of 2:7 equivalent to

Mathematics

2 answers:

zhenek [66]3 years ago

7 0

4:14

because 2*2 is 4 and 7*2 is 14

mars1129 [50]3 years ago

7 0

4:14 is the equivulant ratio of 2:7

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Jacqueline had $.84 cents her brother gave her another $.61 cents write the amount of money Jacqueline now has as a decimal expl

gladu [14]

It is 0.23 because 84-61 is 23 and 23 Divided by 100 is 0.23

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3 years ago

Whats the missing number

Anuta_ua [19.1K]

Answer:

Step-by-step explanation:

X * 3^2 +2 = 47

X * 9 + 2 = 47

9X = 47 - 2

9x = 45

x = 45 : 9

X = 5

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3 years ago

198round to the nearest tens and hundreds

Xelga [282]

198 round to the nearest hundreds is 200
198 round to the nearest tens is 200 too

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3 years ago

PLEASE HELP

Viefleur [7K]

7x²=9+x
so
for
0=ax²+bx+c

$x=\frac{-b+/-\sqrt{b^2-4ac}}{2a}$
so

7x²=9+x
mins 9 from both sides and minus x
7x²-1x-9=0
a=7
b=-1
c=-9

$x=\frac{-(-1)+/-\sqrt{(-1)^2-4(7)(-9)}}{2(7)}$
$x=\frac{1+/-\sqrt{(-1)^2+4(7)(9)}}{2(7)}$
so the 4th one

4 0

3 years ago

Use the quadratic formula to find the roots: -3x^2 + 27x = 42

ch4aika [34]

Answer:

x=2,x=7

Step-by-step explanation:

-3x^2+27x=42

x^2-9x+14=0

x^2-2x-7x+14=0

x*(xi2)-7(x-2)=0

(x-2)*(x-7)=0

x-2=0

x-7=0

x=2

x=7

8 0

3 years ago