3 years ago

Four students each made a list a of prime numbers.

Mathematics

2 answers:

Nataly_w [17]3 years ago

7 0

Jordan did because 21 is not a prime number.

Anuta_ua [19.1K]3 years ago

4 0

Jordan made the error because 21 is a composite number

You might be interested in

.prove that cos (90-A).sinA + sin(90 - A).cosA = 1

pav-90 [236]

Answer:

See Explanation

Step-by-step explanation:

$cos (90-A).sinA + sin(90 - A).cosA = 1 \\ \\ LHS = cos (90-A).sinA + sin(90 - A).cosA \\ \\ = sinA.sinA + cosA.cosA\\ \\ = sin ^{2} A + cos^{2} A \\ \\ = 1 \\ \\=RHS\\\\ reason \\ cos (90- \theta) = sin \theta \\ sin (90- \theta) = cos \theta \\ sin ^{2} \theta + cos^{2} \theta = 1 \\ \\ thus \: proved \\$

4 0

3 years ago

Lamonte finds some nickels and quarters under the couch cushions. How many coins

Lemur [1.5K]

Answer:16 coins and x+y

Step-by-step explanation:

6 0

2 years ago

SOLVE THE SYSTEM USING SUBSTITUTION <br><br> HURRY ILL GIVE BRAINLIEST!!!!

viktelen [127]

5)Substituting any of the following equations; i chose bottom into top:
-2x+5=x+2
=>-3x=-3
=>x=1
Sub the x in any of the eqs to find y so
Y=1+2
=>Y=3
ANS: (1,3)

6) substituting the top equation into the bottom one:
3x+2x+4=9
=>5x=13
=>x=13/5 or 2.6
Sub the x in any of the eqs to find the y so
Y=5.2+4
=>y=9.2
ANS: (2.6, 9.2)

5 0

2 years ago

(a + b)(a – b) = a2 + b2 true or false?

Alja [10]

False it's a2-b2 :))))

3 0

3 years ago

Read 2 more answers

Please help me with this circle area problem!!

kramer

D. 32 square inches.

$ ^ $

3 0

3 years ago

Read 2 more answers