Mathematics College

Find (-21)+(-13)+20.

Answers

Answer 1

Answer:

14

Step-by-step explanation:

-21+-13+20=14

This is true because when subtracting negatives by negatives you pretty much add them and then when you add a positive to a negative you are technically removing the negative by the amount you are adding.

In short its kind of like using inverse operation in a way.

Hope this helps and have a nice day

Also may I please have a brainliest!!!

Related Questions

help read the instructions first​

Answers

Answer:

Step-by-step explanation:

Find attached the second one

Helppppp I willl give u the brainlest!!!!!
What is the diameter, radius, 2, and circumference?
12 in
d-
pan2
Circumference

Answers

Answer:

diameter is 4

Step-by-step explanation:

Charlene and Gary want to make a perfume
2.39 2.58 2.17

Answers

Answer:

What is the question?

Step-by-step explanation:

The volume of a cuboid is 189cm3.
The length is 7cm and the width is 9cm.
Work out the height of the cuboid.

Answers

The height of the cuboid is 3cm. 7x9x3 = 189
Volume = Length x Width x Height

Volume of cuboid:
Let h cm be the height of the cuboid.

7 x 9 x h = 189

63h = 189

h = 189/63

h = 3


The height of the cuboid is 3 cm.

Marian has a goal of running 18 1/2 miles during track practice this week. On Monday she ran 2 1/2 miles, on Tuesday 2.9 miles, on Wednesday 3 3/4 miles, and on Thursday 5 1/4 miles. How far does she need to run on Friday to reach her goal?

Answers

Answer:

4.1

Step-by-step explanation:

(x2 - 4x + 3) + (3x2 – 3x - 5)
2.
(2m – 3+ 7m2) – (3 – 9m2 – 2m)
3.
(3a? – a + 3) + (4a2 – 5)
4.
(2x2 + 3y2 – 22) - (x2 - y2 - z2) + (4x2 – 3y2)
5.
Find the sum of (2x2 - 6x – 2) and (x2 + 4x).
( there are 5 different questions btw)

Answers

Answer:

 (x - 2) • (4x + 1)

Step-by-step explanation:

pls solve ii need it

Answers

Answer:

multiply each decimal

Step-by-step explanation:

Answer:

1.144

Step-by-step explanation:

multiply 1.1x0.8x1.3

Find the 59th term of the arithmetic sequence 26, 17, 8, ...26,17,8,...

Answers

Answer: the 59th term is -496.

Step-by-step explanation:

What is the value of x?
What is the measure of angle A?
What is the measure of angle B?
What is the measure of angle C?

Answers

1. 2x + 20 + x + 10 + 2x - 5 = 180
5x + 25 = 180
5x = 155
x = 31 degrees

2. A = x + 10
A = 31 + 10
A = 41 degrees

3. B = 2x + 20
B = 62 + 20
B = 82 degrees

4. C = 2x - 5
C = 62 - 5
C = 57 degrees

Answer:

∠A =  41

∠B = 82

∠C  = 57

Step-by-step explanation:

Sum of all the angles of triangle = 180

x + 10 + 2x -5 + 2x + 20 = 180

x +2x +2x + 10 - 5 +20 = 180     {Combine like terms}

5x + 25 = 180

         5x = 180 - 25

         5x =155

          x = 155/5

         x = 31

∠A = x + 10 = 31 + 10 = 41

∠B = 2x +20 = 2*31 + 20 = 62 + 20 = 82

∠C = 2x - 5 = 2*31 - 5 = 62 - 5 = 57

i will give you are brainliest if you answer answer question 36 and 37

Answers

Answer:

36) A, 396

37) D, 114 km per lit

Step-by-step explanation:

36) 404 - 8 = 396

37) 112 / 8 = 14

Derwin used 6 gallons of paint to paint two rooms. He used 4 gallons to paint one of the rooms. The equation g + 4 = 6 can be used to find the number of gallons g he used to paint The other room. How many gallons of paint did Derwin use to paint the other room?

Answers

Answer:

He used 2 gallons to paint the other room.

Step-by-step explanation:

g=2

Because 2+4=6

If you subtract 4 from 6 it equals 2.

Hopefully it helps.

Write an equation and solve.
8 less than a number is 24

Answers

8 less than a number can be written as

x-8

when you see the word is you should think of = sign

so the equation will be x-8=24

Now solve adding 8 to both sides.

x=24+8

x=32

Answer:

a-8=24

Step-by-step explanation:

Answer is 32. add 8 to other side, making it 32

PLEASE HELP ME ILL MARK YOU BRAINLY!!

Answers

Answer:

No

Step-by-step explanation:

no because it doesn't pass the horizonal line test

Triangle A is transformed by the
combined transformation of a rotation
of 180° about the point (-1,0) followed
by a translation with vector
-3
2)
One point on triangle A is invariant
under the combined transformation.
What are the coordinates of this point?

Answers

Answer:

( -2.5 , 1 )

Step-by-step explanation:

(-2.5 ,1 ) hope this helps u

A isosceles triangle
B right triangle
C equiangular triangle
D equilateral triangle

Answers

The anwser is question b. There is a 90 degree angle
right angle triangle

please follow me

How do you find the term in a Aromatic sequence

Answers

a
n
​
= the term that you want to find

a
1

​
= first term in the sequence


n = the term position (ex: for 5th term, n = 5 )

d

d = common difference of any pair of consecutive or adjacent numbers

Answer:

An =A1+(n-1)d

Step-by-step explanation:

the nth term of an arithmetic sequence is :

An =A1+(n-1)d   ....a common difference is : d

A1 is the first term

Cook's bakery is making 15 cakes. Each cake contains 2 cups of flour. How many cups of flour (F) are needed to make all the cakes?
A) 2/F = 15
B) F/2 = 15
C) 15/2 = F
D) F = 15 + 13

Answers

Answer:

i think its C pls mark brainliest tho

Step-by-step explanation:

Answer: C

Step-by-step explanation: So it's asking you how many cups of flour in total it is suppossed to be multiplication but since there is no multiplication the only other answer that makes sense it C.

what is the answer please i need help

Answers

Answer:

Step-by-step explanation:

x - 0.35x = (1 - 0.35)x

              = 0.65x

1.00 (-)

0.35

0.65

Can someone please help

Answers

Answer:  5y^3-7x^5

Step-by-step explanation:

Answer:

to be honest do the liked term method and that is probably going to get u yout answer

Which ordered pair is a solution of the equation: y = x + 3 a) (-2,5) b) (3,0) c) (8, 11)​

Answers

Answer:

C) (8, 11)

Step-by-step explanation:

8+3=11.

Triangle RST has vertices R(–1, 1), S(3, 1), and T(3, –4). What
are the coordinates of the image of RST after a translation 4 units to the left and 2 units down?

Answers

Answer:

R'(-5, -1) S'(-1, -1) T'(-1,-6)

Step-by-step explanation:

because the triangle is moving to the left, you subtract the number of units from the x coordinates of each vertex of the triangle. becasue the triangle is moving down, you subtract the number of units moved down from the y coordinates of each vertex.

What is 56x2
Just a regular normal question from me
Your welcome in advance

Answers

Answer:

112

Step-by-step explanation:

hope this helps

Fill in the ladder diagram, I added the photo of the diagram.

Answers

Answer:

Step-by-step explanation:

2   I 500              500 ÷ 2 = 250

      2 I 250          250÷2 = 125

            5 I 125         125 ÷ 5 = 25

                 5 I 25

                      5  I 5

                            1

How do I solve questions like this?​

Answers

Answer:

90

Step-by-step explanation:

90

im pretty sure the anwer is 90

A toy train has 8 compartments and an engine that is 8 inches long. Each compartment is 4 inches long. Each compartment is joined by links that are 3 inches long. How long is that train.

Answers

Answer:

64in

Step-by-step explanation:

links=8*3=24

compartments + engine=4*8+8=40

40+24=64

Find the unit rate.
jacob walks 3 1/2 miles in 1 3/4 hours
how many miles jacob can walk per hour

Answers

Convert both fractions into pure fractions so 3 1/2 becomes 7/2 and 1 3/4 becomes 7/4 now divide 7/2 by 7/4 which is 2. So jacob can walk 2 miles per hour

y = x^2 + 4x - 5
I need to know if it is maximum or minimum , the axis of symmetry , the vertex , domain , range ​

Answers

Answer:

i honestly have no idea

Step-by-step explanation:

Answer:

The coefficient of x^2 is positive (here it is 1) so we have a minimum.

Rearrange it to the form (x-a)^2 + b:

(x+2)^2 - 4 - 5 = (x+2)^2-9

This means the minimum, or vertex, is at (-2,-9)

Parabolas are symmetrical horizontally, so the axis of symmetry is the vertical line at the minimum, which is x = -2

The domain is all numbers

The range is y >= -9

How do you solve this please help it's worth 50 points

Answers

Try this option, if it is possible, check the suggested solutions/answers in other sources.

All the answers are underlined with red colour.

The Denver Post reported that, on average, a large shopping center had an incident of shoplifting caught by security 2.3 times every four hours. The shopping center is open from 10 a.m. to 9 p.m. (11 hours). Let r be the number of shoplifting incident caught by security in an 11 -hour period during which the center is open.

Answers

Answer:

9 hours

Step-by-step explanation:

Write the equation in standard form using integers.

Answers

Answer:

it would be:

3x-4y=-8

Step-by-step explanation:

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