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3 years ago

Helppppppppppppppppp

Mathematics

2 answers:

maw [93]3 years ago

7 0

Answer:

A. is the correct equation

slamgirl [31]3 years ago

5 0

A. should be correct

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If the scale of a map is 2 centimeters=21 kilometers, then what is the actual distance of 14 millimeters?

Ad libitum [116K]

Answer:

14.7 km

Step-by-step explanation:

Given:

Scale of a map is 2 cm = 21 km.

We know that, 1 cm = 10 mm

Therefore, 2 cm = 2 $\times$ 10 = 20 mm

Therefore, the scale of the map is, 20 mm = 21 km

Now, let the actual distance be 'd' km for 14 mm.

Using proportion of the two quantities, we get:

$\frac{d}{14}=\frac{21}{20}$

Multiplying both sides by 14, we get:

$\frac{d}{14}\times 14=\frac{21}{20}\times 14\\d=\frac{21\times 14}{20}=\frac{147}{10}=14.7\ km$

Therefore, the actual distance of 14 mm is 14.7 km.

8 0

3 years ago

How do I solve this problem -4 (3+n)>-32

Ede4ka [16]

Divide by -4 and flip the sign because you are dividing by a negative number

3+n<8

Subtract 3 to get n<5

5 0

4 years ago

Read 2 more answers

What polynomails has the roots of -6, -4 ,and 1? A)x³-9x²-22x+24 B) x³-x²-26x-24 C) x³+x²-26x+24 D)x³+9x²+14x-24.

never [62]

Answer:

x = 1 or x = -4 or x = -6 thus d: is your answer

Step-by-step explanation:

Solve for x over the real numbers:

x^3 + 9 x^2 + 14 x - 24 = 0

The left hand side factors into a product with three terms:

(x - 1) (x + 4) (x + 6) = 0

Split into three equations:

x - 1 = 0 or x + 4 = 0 or x + 6 = 0

Add 1 to both sides:

x = 1 or x + 4 = 0 or x + 6 = 0

Subtract 4 from both sides:

x = 1 or x = -4 or x + 6 = 0

Subtract 6 from both sides:

Answer: x = 1 or x = -4 or x = -6

4 0

3 years ago

Read 2 more answers

A triangle has side lengths of (8d – 3) centimeters, (6d + 2) centimeters, and

alisha [4.7K]

The perimeter of a triangle is the sum of its side lengths.

The perimeter of the triangle is: $14d + 7f +7$

<u>The sides of the triangle are:</u>

Side 1 = (8d - 3) cm

Side 2 = (6d + 2) cm

Side 3 = (7f + 8) cm

The perimeter (P) is calculated as:

P = Side 1 + Side 2 + Side 3

So, we have:

$P = (8d - 3) + (6d + 2) + (7f + 8)$

Remove brackets

$P = 8d - 3 + 6d + 2 + 7f + 8$

Collect like terms

$P = 8d + 6d + 7f - 3 + 2 + 8$

$P = 14d + 7f +7$

Hence, the perimeter of the triangle is: $14d + 7f +7$