# 2021 NECO MATHEMATICS Questions & Answers: 2020 NECO MATHEMATICS ANSWERS Night before Exam

gistpower.com answers

Tuesday 10th Nov
Paper III: Objective – General Mathematics
10:00am – 11:45am
Paper II: Essay – General Mathematics
12:00noon – 2:30pm
===============

MATHS OBJ
1-10: ACBAECABAE
11-20: CCABBCAAEC
21-30: BBEBBBACBD
31-40: CCADBAEABD
41-50: DEBBBCCBBD
51-60: DACEADAEEA

loading...

No. 8 corrected

making some correction to No. 8

No. 8 added

interested in owning a site like exampoint.com.ng? chat me asap. If you don't have money don't chat me.

This is actually gistpower.com 2020 NECO MATHEMATICS ANSWERS, if you need 2021 NECO MATHEMATICS Questions & Answers, Click on the chat button to chat us on Whatsapp now. Our Answers come a night to the exam
gistpower.com answers

(1a)
x¹ y¹. x¹ y¹
A (6,5). B ( -2 ,7)

The equation of a straight line
y² - y¹/x² - x¹ = y-y/x¹-x¹

7-5/-2-6 = y-5/x-6
2/-8 = y-5/x-6
-1/4 = y-5/x-6
4(y-5)= -1(x-6)
4y-20= -x+6
4y+x=6+20
4y+x=26

(1b)
∫² (2x + 9)dx

2x²/2+9x + c|²_¹
x² + 9x + c|²_¹
(2² + 9(2) + C) - ((-1)² + 9 (-1)+ c)
(4+18+c) - (1-9+C)
(22 + C) - (-8 + C)
22+C + 8 - C
=30.

2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
=

(2a)
To calculate u; 18+5+12+u=52
35+u=52
u=52-32=17
u=17

To calculate v
6+5+12+v=35
23+v=35
v=35-23=12
v=12

To calculate w
w+18+17+6+5+12+12
=100
w+70=100
w=100+70=30
w=30

(2b)
at least two means =18+6+5+12=41
; 41 tourist travelled by at least two means of transportation.

2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
=====

(3a)
(i)median =6+6/2=12/2=6
(ii)median + range = 6+7=13
Range = highest value - lowest value = 10-3=7

(3b)
Pr(both pass)
=2/5*3/4=6/20=3/10.

2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
===

(4a)
x²+3x-28=0
x²+7x-4x-28=0
x(x+7)-4(x+7)=0
(x-4)(x+7)=0
x-4=0 or x+7=0
x=0+4 or x=0-7
x=4 or -7

(4b)
8x/9 - 3x/2 =5/6 - x/1
L.c.m=54
6*8x-27*3x=9*5-54*x
48x-81x=45-54x
48x-81x+54x=45
21x/21=45/21
x=45/21=15/7=2⅐

2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
======

(5)

(5a)
d/dx(4x³ - 2x + 4)⁵
= 5(4x³-2x+4)⁴ × (12x² - 2)
= 10(6x² - 1)(4x³ - 2x + 4)⁴

(5b)
5/3(2-x) - (1-x)/(2-x) = 2/3
Multiply through with 3(2-x)
3(2-x)[5/3(2-x)] -3(2-x)[1-x/2-x] = 3(2-x)(2/3)
5 - 3(1-x) = (2 - x)(2)
5 - 3 + 3x = 4 - 2x
3x + 2x = 4 + 3 - 5
5x = 2
X = 2/5 2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
========
(6)

(6ai)
Volume of sphere = 9 ⅓ ×(its surface area)
4/3πr³ = 28/3×4πr²
r = 28 units

Surface area = 4πr²
= 4x22/7×28×28
= 9856 units squared.

(6aii)
Volume = 9 ⅓ × 9856
= 28/3 × 9856
= 91989.33
=91989 cubic units

(6b)
log10(3x - 5)² - log10(4x -3)² = log10 25
Log10(3x - 5/4x - 3)² = log10 25
(3x - 5/4x - 3)² = 25
Square root of both sides gives
3x-5/4x-3 = ±5
3x-5 = 5(4x-3) OR 3x-5 = 5(4x-3)
3x-5 = 20x-15 OR 3x-5 = 20x+15
3x-20x = 5-15 OR 3x+20x = 15+5
-17x = -10 OR 23x = 20
X = 10/17 OR x = 20/23 2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
=======

(7)

(7a)
Given: 3x + 5y = 10
5y = -3x + 10 OR y = -3/5x+ 2
Gradient of the straight line = -1 ÷ (-2/5)
= 5/3
Equation of line:y-2/x-3 = 5/3
3y-6 = 5x - 15
3y = 5x - 15 + 6
3y = 5x - 9
y = 5/3x - 3
Intercept of line = -3

(7b)
Amount = P(1+R/100)³
=8000(1+5/100)³
=8000(1.05)³ OR 8000(1.05/100)³
=8000×1.157625
=#9261

Compound interest = Amount - principal
= 9261 - 8000
= ₦1,261

2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
=====

(8a)
Ta; a+8d=50 --------(1)
T12; a+11d=65---------(2)
Subtract equation (1) from (2)
a+11d-(a+8d)=65-50
a+11d-a-8d=15
11d-8d=15
3d/3=15/3
d=5

Substitute for d=5 in each equation (1)
a+8d=50
a+8(5)=50
a+40=50
a=50-40=10
Sn=n/2(2a+(n-1)d)
S70=70/2(2*10+(70-1)5)
=35(20+69*5)
=35*365=12,775

2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
==

(10a)
Let the woman's age be W
Let the daughter's age be d
Given: w = 4d-----(1)
Given:(w+5)²=(d+5)²+120--(2)
Put eqn(1)into(2)
(4d+5)² = (d+5)² + 120
(4d+5)² - (d+5)² = 120
[4d+5+d+5][4d+5-d-5] = 120
[5d+10][3d] = 120
5(d+2)(3d) = 120
15(d+2)(d) = 120
d(d+2) = 8
d² + 2d - 8 = 0
d² + 4d - 2d - 8 = 0
d(d+4) -2(d+4) = 0
(d - 2)(d + 4) = 0
d - 2 = 0 (only)
d = 2
Daughter is 2 years old

(10b)
t = w + wy²/PZ
Multiply through by PZ
Pat = PWZ + wy²
Wy² = ptz - pwz
y² = Pz(t - w)/w
y = ±√PZ(t - w)/w
If P = 5, Z = 10, t = 9, w=3
y = ±√(5)(10) (9-3)/3
y = ±√(5)(10)(6)/3
y = ±√100
y = ±10 2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

(11)

(11)
|Score|5-9|10-14|15-19|20-24|25-29|30-34|

|Frequency|3|10-T|3T|8|2T+2|T+2|

(a)Ʃ+=50
3+10-T+3T+8+2T+2+T+2=50

3+10+8+2+2-T+3T+2T+T=50

25+5T=50
5T=50-20
5T/5=25/5
T=5

(11b)
|Score|5-9|10-14|15-19|20-24|25-29|30-34|

|Frequency|3|5|15|8|12|7|

The frequency of the modal class is 15.

(11c)
Tabulate.
|Score|5-9|10-14|15-19|20-24|25-29|30-34|

|F|3|5|1|5|8|1|2|7|50

|X|7|12|17|22|27|32|

|FX|21|60|255|176|324|224|1060

|X-x̅|-14.2|-9.2|-4.2|0.8|5.8|10.8|

|(X-x̅)²|201.64|84.64|17.64|0.64|33.64|116.64|

F|(X-x̅)|604.92|423.2|264.6|5.12|403.68|816.48|2518

Mean (x̅) =Ʃfx/Ʃf=1060/50=21.2

Variance =Ʃf(x-x̅)²/Ʃf
=2518/50
=50.36

2021 NECO MATHEMATICS Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
=======

(12a)
y=²-2x-3
Tabulate
|x|-2|-1|0|1|2|3|
|y|5|0|-3|-4|-3|0|

(12b)
Graph. (12c)
y=1-3x
|y|-2|-1|0|1|2|3|
|x|7|4|1|-2|-5|-8|

(12d)
(i)the root of the equation x² - 2x - 3= 1-3x are -3 and 1.6

(ii) the minimum value of y is - 4 and the corresponding value of x is 1

loading...

SEND YOUR MTN-CARD + PHONE NUMBER + SUBJECTS YOU ARE PAYING FOR  TO 07058713598

BELOW IS HOW TO MAKE YOUR PAYMENT ONLINE & GET CONFIRM IMMEDAITELY

Share our site to all Candidates on your WhatsApp

Beware of Scammers.... Please always use 07058713598 for all your transactions to avoid being scammed.
NOTE: Any answer that does not have badge can be chnaged, removed or updated anytime. The badge means that the answers have been verified 100% (if used exactly, you're to get nothing but A1) while without the badge means that the answer is still under verification. If you're not in a hurry, please wait for answer to be verified before you copy.
Click on the drop down links to view answer under them.
Good Luck... Invite family and friends to gistpower.com... We are the best and we post, others copy from us.

LEGIT EXPO BEST WEBSITE FOR WAEC EXPO RUNZ, NECO EXPO RUNZ, WAEC GCE EXPO RUNZ, NABTEB EXPO RUNZ, WHATSAPP GROUP LINK, LIST OF EXAM EXPO SITE, TOP BEST EXAM SITE, FREE EXAM EXPO SITE, CEEBOOKANSWERS, EXAMKEY, GURUSCAMP, EXAMBABA, EXAMGREAT, EXPOLOADED, EXAMLOADED, EXAMLORD, GURUSFAMILY, EXPOTAB, GIDIFANS, EXAMPIN, EXAMAFRICA, WAEC CLASS, WAEC WHATSAPP GROUP LINK, EXAM ANSWER, EXPO LEGIT, FUNLOADED, EXPO ANSWER, FREE WAEC EXPO SITE, FREE NECO EXPO SITE

### QUESTIONS AND ANSWERS FOR 2021 NECO MATHEMATICS ANSWERS

#### EXAM DETAILS:

PIN: 9942
Subject:
Exam:
Year:
Updated At: April 12th 2021, (07:04:17)

SEE ALSO: Neco 2018 agric answer
SEE ALSO: 2020 NECO HISTORY ANSWERS
SEE ALSO: 2020 NABTEB PHYSICS ANSWERS
SEE ALSO: 2021 NECO GCE AGRIC. SCIENCE ANSWER
SEE ALSO: 2020 WAEC MAY/JUNE BIOLOGY PRACTICAL ANSWERS
SEE ALSO: 2020 WAEC MAY/JUNE GOVERNMENT ANSWERS
SEE ALSO: 2020 NECO PHYSICS PRACTICAL ANSWERS
SEE ALSO: Neco Gce 2018. English language answers. (unsubscribed)
SEE ALSO: 2019 Waec Igbo answers
SEE ALSO: 2020 WAEC GCE 2ND SERIES IGBO, HAUSA & YORUBA ANSWERS
SEE ALSO: 2019 Waec Gce Geography PRAT Answer
SEE ALSO: 2019 Gce Waec C. R. S Studies Answers
SEE ALSO: Neco Gce 2018. Biology practical answers
SEE ALSO: Waec Gce 2018. Lit. In English Answers
SEE ALSO: 2020 WAEC COMMERCE ANSWERS
SEE ALSO: 2018 further maths answers
SEE ALSO: 2018 neco gce. Hausa answers
SEE ALSO: 2020 NECO CHEMISTRY PRACTICAL ANSWERS
SEE ALSO: 2020 WAEC GCE 2nd series Physics Answers
SEE ALSO: 2018 neco marketing answers
SEE ALSO: 2018 ðŸ’» science answer
SEE ALSO: 2018 Waec Gce biology answers
SEE ALSO: 2018 Waec Gce geography answers
SEE ALSO: Waec Gce 2018. Food and nut
SEE ALSO: 2021 NECO GCE F/ACCOUNTING ANSWERS
SEE ALSO: 2020 WAEC GCE 2nd SERIES MATHEMATICS ANSWERS
SEE ALSO: Chemistry Answer
SEE ALSO: 2020 NECO GEOGRAPHY ANSWERS
SEE ALSO: 2020 WAEC MAY/JUNE ANIMAL HUSBANDRY PRACTICAL ANSWERS
SEE ALSO: 2018 NECO GCE ANSWERS. CIVIC EDUCATION
Chukwu Chiamaka A. said: my jamb was good tnx... view all reviews