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11Alexandr11 [23.1K]
3 years ago
9

Someone please help!!!10, 12, and 14

Mathematics
1 answer:
Oliga [24]3 years ago
6 0

Answer:

Step-by-step explanation:

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-2 + (–15) = –(2 + 15) what property is this equation
barxatty [35]

Hello.

The answer is: The Commutative property

The Commutative property states that order does not matter. Multiplication and addition are commutative. Commutative is also when you change the order of the equation but its still that same answer.

Have a nice day.




4 0
3 years ago
What’s the equation that is parallel line 3y-4x=6<br> please help for brainlist
iren2701 [21]

Answer:

y=3/4 x-6

Step-by-step explanation:

i passed this

6 0
3 years ago
19. The present age of brother and sister are in the ration 4:5 Before three years the ration of their age was 3:4. find their p
Lyrx [107]

Answer:

Sister = 15 years old

Brother = 12 years old

Step-by-step explanation:

Right now, if the brother is B years old and the sister is S years old, B = (4/5)S because the ratio from brother to sister is 4:5, so if one unit is X, B = 4X and S = 5X

Three years ago, the brother was B-3 years old and the sister was S-3 years old. Keeping one unit as X, we have

B = 3X

S = 4X

B-3 = (3/4)(S-3)

Therefore, we have a system of equations

B = (4/5)S

B-3 = (3/4)(S-3)

Substitute (4/5)S for B into the second equation to only have one variable

(4/5)S - 3 = (3/4)(S-3)

(4/5)S - 3 = (3/4)S - 9/4

add 3 to both sides and subtract (3/4)S from both sides to isolate the variable and its coefficient

(1/20)S = 3/4

multiply both sides by 20 to isolate the S

S = 15

B = (4/5)S = 12

5 0
3 years ago
Mariana signed up for a streaming music service that costs $7 per month. The service allows Mariana to listen to unlimited music
valkas [14]

Answer:

50$

Step-by-step explanation:

$1.25x40= 50 so she would have to pay 50$

8 0
3 years ago
A fire ranger stands atop an observation tower 70 feet above the ground and sees a fire in the distance. She measures the angle
mrs_skeptik [129]

Answer:

103.78\:\mathrm{ft}

Step-by-step explanation:

We can form a right triangle where the distance between the ranger's current position and fire is the hypotenuse of the triangle. In a right triangle, the tangent of an angle is equal to its opposite side divided by the hypotenuse.

Therefore, we have:

\tan 34^{\circ}=\frac{70}{x}, where x is the distance between the base of the tower and the fire.

Solving, we get:

x=\frac{70}{\tan 34^{\circ}}=103.779267796\approx \boxed{103.78\:\mathrm{ft}}

8 0
3 years ago
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