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sasho [114]
3 years ago
7

PLEASE HELP

Mathematics
1 answer:
Korolek [52]3 years ago
5 0

Answer:

v=2 s=5

Step-by-step explanation:

a) v=volleyball s=soccer

s × v = 7

" the soccer (s) practice lasts 1 hour (1) more than (+) twice as long (2) as the volleyball (v) practice; this simplifies to: s = 1 + 2v

b) substitute equation for soccer for s

(1 + 2v) + v = 7

solve for v

1 + 3v = 7   (2v + v = 3v; that's where the 3v comes from)

we subtract 1 from both sides

3v = 6

we divide 3 from both sides

v=2

solve for s

since we know what v equals, we substitute it in

s + 2 =7

subtract 2 from both sides

s = 5

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A square has a a side lenght of 5 feet what is its area?
goldenfox [79]

Answer:

25 sq feet

Step-by-step explanation:

Length = 5 feet

Area = (Length)²

        = 5²

        = 25 sq feet

7 0
2 years ago
Los angeles is 1,744 miles from chicago; chicago is 714 miles from new york; and new york is 2,451 miles from los angeles. The t
klemol [59]

Answer:

170°

Step-by-step explanation:

Let a be the distance from Los Angeles to Chicago = 1744 miles, b be the distance from Chicago to New York = 714 miles and c be the distance from New York to Los Angeles = 2451 miles.

A is the angle opposite to side a, B is the angle opposite to side b and C is the angle opposite to side c.

Therefore the angle at Chicago is  C.

From cosine rule:

c² = a² + b² - 2ab × cos (C)

2ab × cos (C) = a² + b² - c²

cos (C) = (a² + b² - c²) / 2ab

Substituting:

cos (C) = (1744² + 714² - 2451²) / 2×1744×741

cos (C) = -0.986

C = cos⁻¹ (- 0.986) = 170°

3 0
3 years ago
Work out the area of this circle. Give you answer in terms of pi and state it’s units
tino4ka555 [31]

Answer:

49π

Step-by-step explanation:

area of circle = πr^2

<em>Handy Tip: cherry pies delicious; apple pies are(R) too(2)! so C = πd and A = πr^2</em>

diameter = 14 cm

radius = 14/2 = 7cm

area of circle = π(7)^2

area of circle = 49π

Hope that helps!

3 0
3 years ago
1. Write and solve an expression
nata0808 [166]

Answer:

9<(5+7). the answer is 12

Step-by-step explanation:

hope it helps : )

7 0
3 years ago
How many solutions does the equation<br> -2(x + 4) = -2(x + 4) - 6 have?
solniwko [45]
-2x - 8 = -2x - 8 - 6
-2x - 8 = -2x - 14
-8 = -14, false
Solution: no solution
6 0
2 years ago
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