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2 years ago

.In which step below does a mistake first appear in

Mathematics

1 answer:

Dmitry [639]2 years ago

5 0

Answer:

step 2

Step-by-step explanation:

from -8(a+6) to -80 - 48 is incorrect

when you multiply -8 x a it's -8a not -80

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A water pipe under Buckingham Palace is 59 m long. A water pipe under the White House is 36 m long. What is the difference in th

RUDIKE [14]

59m - 36m = 23m

23m is your answer.

7 0

3 years ago

Read 2 more answers

The terminal side of an angle in standard position passes through P(15, –8). What is the value of sine theta? sine theta = fifte

Pavlova-9 [17]

The value of sine theta = negative eight-seventeenths ⇒ 2nd

Step-by-step explanation:

Let us revise the quadrant of an angle its terminal side passes through a given point

If the given point is (x , y), then the angle lies in the 1st quadrant
If the given point is (-x , y), then the angle lies in the 2nd quadrant
If the given point is (-x , -y), then the angle lies in the 3rd quadrant
If the given point is (x , -y), then the angle lies in the 4th quadrant

∵ The terminal side of angle Ф passes through P (15 , -8)

∵ x = 15 and y = -8

- P is (x , -y), then the angle Ф lies in the 4th quadrant

∵ The terminal side of angle Ф is the hypotenuse of a right

triangle whose horizontal leg is 15 units and vertical leg

is -8 units

- Use Pythagoras Theorem to find the length of the hypotenuse

∴ Hypotenuse = $\sqrt{(15)^{2}+(-8)^{2}}=17$ units

∵ sinФ = $\frac{opposite}{hypotenuse}$

∵ The side opposite to Ф is -8

∵ The hypotenuse is 17

∴ sinФ = $\frac{-8}{17}$

The value of sine theta = negative eight-seventeenths

Learn more:

You can learn more about the trigonometry function in brainly.com/question/4924817

#LearnwithBrainly

3 0

3 years ago

Read 2 more answers

Justin ate 1/4 of a pie. If there were 8 slices of pie, how many sclices did justin eat

WITCHER [35]

Answer:

Step-by-step explanation:

8 x 1/4 = 2

He ate 2 slices

5 0

2 years ago

Read 2 more answers

PLEASE HELP ON #3 ASAP!

IrinaK [193]

9514 1404 393

Answer:

1a: x+3 = 5

1c: 6 = 2z

2b: x = 2

2d: 3 = z

3: the solutions make the hangars balance

Step-by-step explanation:

1. We can write the equations by listing the contents of the hangar and using an equal sign to show the balance between left side and right side. It can work well to put left side contents of the hangar on the left side of the equal sign.

A: x + 3 = 5

C: 1 + 1 + 1 + 1 + 1 + 1 = z + z simplifies to 6 = 2z

2. B: We can subtract 3 from both sides of the hangar (and equation) to find the value of x.

(x +3) -3 = 5 -3

x = 2 . . . . . hangar balances with 2 on the right

D: We can divide both sides of the hangar by 2, splitting the content into two equal parts. Then one of those parts can be removed from each side.

2(3) = 2(z)

3 = z . . . . . . hangar balances with 3 on the left

3. The found values will keep the hangar in balance when they are substituted for the corresponding variables.

A: 2 + 3 = 5

C: 1 + 1 + 1 + 1 + 1 + 1 = 3 + 3

4 0

3 years ago

Plz help due tomorrow

sp2606 [1]

Answer:

21y^2+11.2

Step-by-step explanation:

4-3y(-7y)+7.2

combine like terms

-3y (-7y) = 21y^2

add 4 to 7.2

11.2

21y^2 + 11.2

8 0

3 years ago