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2 years ago

Hello' if you can please show the steps too that would be much appreciated!

Mathematics

2 answers:

DochEvi [55]2 years ago

7 0

Step-by-step explanation:

Hi! I hope this helps and have a great day.

sdas [7]2 years ago

5 0

Answer:

roots: x= 7, 4

Step-by-step explanation:

factored form: f(x) = (x-7) (x-4)

(idk if it's correct, sorry :()

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Using the geometric mean and Pythagorean theorem, calculate the values of the missing sides. Round your answers to the thousandt

Pachacha [2.7K]

Answer:

a = 9.849

b = 20.25

c = 491.03

Step-by-step explanation:

By using Pythagoras theorem in the right triangle BDC,

(Hypotenuse)² = (Leg 1)² + (Leg 2)²

BC² = BD² + DC²

a² = 9² + 4²

a = $\sqrt{(81+16)}$

a = $\sqrt{97}$

a = 9.8489

a ≈ 9.849 units

By mean proportional theorem,

$\frac{\text{DC}}{\text{BD}}=\frac{\text{BD}}{\text{AD}}$

AD × DC = BD²

b × 4 = 9²

b = $\frac{81}{4}$

b = 20.25 units

BY Pythagoras theorem in ΔADB,

AB² = AD² + BD²

c² = b² + 9²

c² = (20.25)² + 9²

c² = 410.0625 + 81

c = 491.0625

c = 491. 063 units

6 0

3 years ago

Can someone just please explain why in PEMDAS for example: 6 + 9 ÷ 3 × 7. Why do you do the division (9/3) before the multiplica

Grace [21]

Because is division is before multiplication you have to do division even though the m is before d.

7 0

3 years ago

Question 3:

goldenfox [79]

Answer:

Step-by-step explanation:

x^2 + 7x+ 10. factors out to (x - 2)(x + 5)

5 0

3 years ago

What does -22 belong to

Len [333]

Answer:

it's part of the real number system

it's a rational number

it's an integer

Step-by-step explanation:

6 0

2 years ago

David and Mark are marking exam papers. Each set takes David 24 minutes and Mark 1 hour. Express the times David and Mark take a

attashe74 [19]

Answer:

2:5

Step-by-step explanation:

david=24mins

mark = 1hour

change 1 hour to mins

DAVID=24

MARK=60

24:60

THEN SIMPLIFY

24/60

=2/5

2:5

8 0

3 years ago