3 years ago

Tell which number is prime: 39, 69, 89, 90.

Mathematics

2 answers:

zmey [24]3 years ago

6 0

The answer is 89 is a prime number because it has only two distinct divisors: 1 and itself

Sever21 [200]3 years ago

5 0

Answer:

Step-by-step explanation:

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Which expression is the factored form of -4.5n+3?

TEA [102]

The right ans is D.I am 100%sure.

if my ans was gelpful u can follow me.

5 0

3 years ago

Add. (6x3+3x2−2)+(x3−5x2−3) Express the answer in standard form.

sergiy2304 [10]

Answer:

$7x^3-2x^2-5$

Step-by-step explanation:

We need to add the two terms.

$(6x^3+3x^2-2)+(x^3-5x^2-3)$

Solving,

Combine the like terms and adding those terms

$(6x^3+3x^2-2)+(x^3-5x^2-3)\\=6x^3+3x^2-2+x^3-5x^2-3\\=6x^3+x^3+3x^2-5x^2-2-3\\=7x^3-2x^2-5$

So, the answer is:

$7x^3-2x^2-5$

6 0

3 years ago

ASAPPP HELP PLEASE!!!!!!

Nostrana [21]

Answer:

-36/7

Step-by-step explanation:

-4/7 x 9

-4 x 9/ 7

That’s how I got -36/7

7 0

2 years ago

Amanda, Boris, and Jose sent a total of 124 text messages during the weekend. Amanda sent 8 fewer messages than Jose

GrogVix [38]

Answer:

Amanda= 14

Boris = 88

Jose= 22

Step-by-step explanation:

Amanda= jose-8

Boris = 4×jose

Jose= Jose

total all = 124

(jose-8)+(jose×4)+(jose)= 124

so we substitute jose with X .

(X-8)+(4X)+(X)=124

6X-8= 124.

6X=124+8

X=132/6

X= 22.

so that total jose is 22, minus 8 we get Amanda, times 4 we get Boris.

7 0

2 years ago

a room contains 156.1m of air . if the room is 8.31m long and 5.72m wide . use tabe to calculate it height

irga5000 [103]

Answer:

height=3.28m

Step-by-step explanation:

air means volume of room

let the height of room be x.

so, volume of room= 156.1 m³

8.31*5.72*x=156.1m³

x =3.28m

8 0

3 years ago