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BlackZzzverrR [31]
3 years ago
6

Do 3 questions for 12 points.

Mathematics
1 answer:
tresset_1 [31]3 years ago
6 0

Answer:

  3.  -2

  4.  12

  5.  -4

Step-by-step explanation:

For all problems, let n represent "a number." You will note that when we specify an operation to be done on the equation, it is done to <em>both sides of the equation</em>.

__

3. 5n +(-3) = -13

  5n = -10 . . . . . . add 3

  n = -2 . . . . . . . . divide by 5

The number is -2.

__

4. (n/2) -7 = -1

  n/2 = 6 . . . . . . . add 7

  n = 12 . . . . . . . . multiply by 2

The number is 12.

__

5. 2n -1 = -9

  2n = -8 . . . . . add 1

  n = -4 . . . . . . divide by 2

The number is -4.

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If triangle ABC is isosceles and triangle DBE is equilateral what is the measure of angle C
luda_lava [24]

Answer:

43°

Step-by-step explanation:

For triangle ABC:

A = C so all we need to do is to calculate the value of B

The measure of angle ABD is given as 17° so the measure of angle EBC must be 17° as well

Since DBE is an equilateral triangle angle is DBE = 60°

17 + 17 + 60 = 94 this is the measure of angle B

The sum of interior angles in a triangle is equal to 180

A + B + C = 180

A + C + 94 = 180

A + C = 86 since A = C we divide 86 by 2

C = 43°

6 0
3 years ago
b. If each square has a side length of 61 cm, write an expression for the surface area and another for the volume of the figure
Blababa [14]

Answer:

6*(61^2) and 61^3

Step-by-step explanation:

If the squares have a side length of 61 (assuming this is a cube) our surface area is 6*(61^2) because each side is a square and there are six sides.

As for the volume, we have 61^3.

Hope this was helpful.

~cloud

8 0
3 years ago
You are baking brownies for your class. There are 28 total students in your class and you have baked 23 brownies. Right and solv
slavikrds [6]

Answer:

x = 33

Step-by-step explanation:

Given

Students = 28

Brownies = 23

Brownies = 2\ per\ student

Required

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If:

Brownies = 2\ per\ student

and there are 28 students

Then:

Total\ Brownies = 2 * 28

Total\ Brownies = 56

To determine the number of brownies left, we have:

Total\ Brownies = Brownies\ Made + Brownies\ Left

56 = 23 + x

Reorder

x + 23 = 56

Collect Like Terms

x = 56 - 23

x = 33

<em>Hence, there are 33 brownies left</em>

6 0
4 years ago
Given that 3+√5/4−√5 = a + b√5, find the values of “a” and “b”<br>URGENT PLZ ANSWER!
Vikki [24]

Answer:

Step-by-step explanation:

hello :

√(5/4)= √5/ √4 =√5/2 = (1/2)√5

3+√5/4−√5 = 3+(1/2)√5   so : a=3  and  b= 1/2

6 0
4 years ago
if your answer is "No," how much more lacquer does she need? if your answer is "yes," how much lacquer will she have left over?
babunello [35]

my answer is no ,yes ,no

So ,maybe u find the answer

Step-by-step explanation:

if your answer is "No," how much more lacquer does she need? if your answer is "yes," how much lacquer will she have left over?AND if it is also no ,yes , no...show your work to justify your answer.

3 0
3 years ago
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