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3 years ago

1. 90c : $4.50 2. 80cm : 1.2m

Mathematics

2 answers:

zepelin [54]3 years ago

7 0

Hey the answer for that question is 2:3

horrorfan [7]3 years ago

4 0

Answer:

see explanation

Step-by-step explanation:

Before simplifying the ratios we require them to have the same units.

(1)

$4.50 = 450c, thus

90c : $4.50

= 90 : 450 ← divide both parts by 10

= 9 : 45 ← divide both parts by 9

= 1 : 5

(2)

1.2 m = 1.2 × 100 = 120 cm, thus

80 cm : 1.2 m

= 80 : 120 ← divide both parts by 10

= 8 : 12 ← divide both parts by 4

= 2 : 3

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Alchen [17]

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As we know that :

${i}^{2} = i \times i = - 1$

so, over here

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3 years ago

At a point on the ground 35 ft from the base of a tree, the distance to the top of the tree is 1 ft more than 3 times the height

jolli1 [7]

Answer:

Step-by-step explanation:

This is a question that uses the Pythagorean Theorem.

a = 35 feet

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c = 3*x + 1 so we are trying to find x. Substitute into a b and c

a^2 + b^2 = c^2

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Does this factor?

(x + 12.75)(x - 12)

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6 0

4 years ago

Read 2 more answers

Please help need answer now!!

Vesna [10]

Answer: 5/2

Step-by-step explanation:

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3 years ago

Which are the solutions of the quadratic equation?

Artemon [7]

Answer:

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$x_2=\frac{7-\sqrt{65}} {2}$

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2}=7x+4$

equate to zero

$x^{2}-7x-4=0$

$a=1\\b=-7\\c=-4$

substitute in the formula

$x=\frac{-(-7)\pm\sqrt{-7^{2}-4(1)(-4)}} {2(1)}$

$x=\frac{7\pm\sqrt{65}} {2}$

therefore

$x_1=\frac{7+\sqrt{65}} {2}$

$x_2=\frac{7-\sqrt{65}} {2}$

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4 years ago

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