Mathematics Middle School

Help with this two pls

Answers

Answer 1

Answer:

I'm not sure about 20 but here's 21.

Part A is 274.622.

Part B is 282.018

Step-by-step explanation:

Part A show work:

278.320

- 3.698

________

274.622

Part B show work:

278.320

+ 3.698

________

282.018

Answer 2

20. Seens to 1. 21. A. 21. B

Related Questions

Andy had 20% fewer marbles than Henry. When Andy gave 80 marbles to Henry, the number of marbles he had left was half of what Henry had. How many marbles did Andy have in the beginning?

Answers

Answer:

I think it is 400

Not 100% sure

Step-by-step explanation:

*a=andy

h=henry

(h+80)x2=a-80

20%a=h

(20%a+80)*2=a-80

40%a+160=a-80

40%a+240=a

240=a-40%a

240=60%a

400=a

Andy has 320 marbles while Henry has 400 marbles.
Explanation:
Although there are two people involved in this problem, we can solve it by using one variable.
Let the number of marbles that Henry has be
x
Andy has
80
%
x
and
Henry has
100
%
x
or, Andy has
0.8
x
marbles and Henry has
x
marbles
Andy now gives 80 marbles to Henry, so he has 80 fewer marbles and Andy has 80 more marbles.
Andy has
:
(
0.8
x
−
80
)
and Henry has
(
x
+
80
)
Andy now has half as many as Henry , which means that Henry has twice as many as Andy.
Don't make the mistake of doubling Henry's marbles!

He already has more than Andy, Doubling what Andy

has will be the same as what Henry has.
2
×
Andy's marbles
=
Henry's marbles
2
(
0.8
x
−
80
)
=
x
+
80
1.6
x
−
160
=
x
+
80
0.6
x
=
80
+
160

0.6
=
3
5
5
3
×
3
5
x
=
240
×
5
3
x
=
400
From our original definition of
x
we now know that Henry has 400 marbles.
Andy has
80
100
×
400
=
320
marbles

A bag of marbles contains 12 blue marbles, 5 red marbles, and 13 green marbles. if one is selected at random, what is the probability that the selected marble is blue?

A. 0
B. 2/5
C. 13/30
D. 5/6
E. 1

Answers

Answer:

2/5

Step-by-step explanation:

Total marbles=12+13+5=30

P(that the selected marble is blue) = 12/30 = 6/15 = 2/5

I think it’s B sorry if im wrong

Please Help Me! I will give brainly!!

The distance from your front door to the mailbox is 18 4/5 meters. The distance from your front door to your basketball hoop is 13 7/10 meters. How much farther from your front door is the mailbox than the basketball hoop?

Answers

Answer:

5 1/10 meters

Step-by-step explanation:

18 4/5 can be changed to 18 8/10 so

18 8/10 - 13 7/10 = 5 1/10 meters

5 1/10 meters ahhhhhhhhhhhh

Last week, Lamar had $983.45 in his checking account. Since then, he paid $214.67 for his car loan. He also donated $15 to the fire department. Then, Lamar deposited the $50 check his grandma sent him for his birthday. What is Lamar's balance now?

Answers

803.78

983.45 - 214.67 - 15 + 50

Answer:

$803.78

Step-by-step explanation:

983.45-214.67-15+50=803.78

Tehira has read 110 pages of a 290-page book. She reads 20 pages each day. How many days will it take to finish?

A. 20 + 110p = 290
B. 20p + 290 = 110
C. 110 + 20p = 290
D. 290 = 110 - 20p

Answers

Tehra has read (completed)=110Total pages=290

Pages left:-

[tex]\\ \sf\longmapsto 290-110=180[/tex]

She read everyday=20

Total days

[tex]\\ \sf\longmapsto \dfrac{180}{20}=9[/tex]

If days be p the equation will be

[tex]\\ \sf\longmapsto 20p+110=290[/tex]

the answer is C!!!!!!!!!!!!!

Please answer all these questions right I can’t do them ‍♀️
I will mark you as brainliest if you do!

Answers

Step-by-step explanation:

first take out graph paper then line it

sorry i don't have graph copy right now hope it work

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