All categories

3 years ago

Help on problems like 9y equals 81

Mathematics

2 answers:

stepan [7]3 years ago

3 0

9y=81
divide 9 from both sides to have y by itself
y=9

Gnoma [55]3 years ago

3 0

You divide 9y by 81 and you get 9 so y=9

You might be interested in

7,051,004,264 in expanded notation

riadik2000 [5.3K]

7,000,000,000 + 0 + 50,000,000 + 1,000,000 + 0 + 0 + 4,000 + 200 + 60 + 4

I’m not sure if you’re supposed to put the commas in it

3 0

3 years ago

Help me jim! geometry homework

Maksim231197 [3]

Question 1

The angles 52 degrees match up. So if the sides are in proportion, then the triangles are similar.

Notice how 8/12 = 18/27 is a true equation. So the sides are in proportion to one another.

Therefore, the triangles are similar. I used the SAS similarity theorem.

================================================================

Question 2

Let's find the missing angle of the triangle on the right. For now, make that missing angle to be x.

Rule: For any triangle, the three angles always add up to 180

x+70+32 = 180

x+102 = 180

x = 180-102

x = 78

The missing angle of the triangle on the left is 78 degrees

Repeat for the other triangle as well

y+78+32 = 180

y+110 = 180

y = 180-110

y = 70

Both triangles have the angles 32, 70, 78 in whatever order you wish.

Since the angles match up like this, the triangles are similar because of the AA Similarity theorem

Technically, we only need 2 pairs of congruent angles at minimum. But having 3 congruent pairs doesn't hurt either.

================================================================

Question 3

We have a pair of congruent 54 degree angles shown. There's another pair of angles at the very top that overlap (aka shared angles).

Since we have two pairs of congruent angles, the two triangles are similar.

This time we use the AA Similarity theorem

================================================================

Question 4

Let's divide the longest side of the bottom triangle by the longest side of the triangle on top

48/32 = 1.5

Now let's divide the shortest sides of each triangle in the same order

36/24 = 1.5

Repeat for the middle-most sides

45/30 = 1.5

We get the same linear scale factor 1.5 each time. Therefore, the triangles are similar due to the SSS Similarity theorem

================================================================

Question 5

Any angle is equal to itself due to the reflexive property. So that will go for reason number 2.

Reason 3 is SAS similarity because we have the sides in proportion (statement 1) and the angles are congruent (statement 2).

3 0

2 years ago

8.41 x 7.82 x 414 40.6 x 80.22 What is the awnser

Zina [86]

Answer:

the answer that i got was 88677161.1

Step-by-step explanation:

i just multiplied all of them together, hope it helps

6 0

3 years ago

Is (8,8) a solution to the inequality y < 6x + 5?

NARA [144]

Answer: Yes

Step-by-step explanation: It falls under the shaded area created by y < 6x+5

4 0

3 years ago

PLEASE HELP WITH #14 AND #7 PLEASE A.S.A.P !!!

kodGreya [7K]

Answer:

7.) 16.7

Step-by-step explanation:

7). First you have to find the length of the line with the triangle that is at a 90 angle with the longest side of the triangle

Using the pythagrorem theorem a² + b² = c²

4² + b² = 5²

b² = 5² - 4²

b² = 25 - 16

b² = 9

√b² =√9

b = 3

next you do the same thing to find the missing segment of the longest side

3² + b² = 13²

b² = 169 - 9

b² = 160

b = √160 or ≈ 12.7

12.7 + 4 = 16.7

so 16.7 is the length of that side

3 0

4 years ago