List all the factors of 19. Tell whether 19 is prime or composite.

Answers

Answer 1

Answer: Prime numbers are numbers that have only two factors: 1 and itself (example 2 = 1*2, 3 = 1*3)
19 is a prime number because it's only factors are 1 and 19 (itself)

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Evaluate the expression 7×18+45÷3×2

Answers

Answer:

156

Step-by-step explanation:

7 * 18 = 126

126 +45 / 3 * 2

45 / 3 = 15 * 2 = 30

126 + 30 = 156

Answer:

156

Step-by-step explanation:

Given vectors a and b, which operation does the green vector show? options: 2a + ba - b
a + b
ab

Answers

If we treat b sliding vector, then head of green vector coincide with tail of b vector. So,in this Senior a is acting as a resultant vector. To get this resultant vector a, the green vector must be a-b.

Can someone show me how to do this? What volumes of 60% hydrochloric acid solution and 30% hydrochloric acid solution must be mixed to make 125mL of 36% hydrochloric acid solution?

Answers

u need two equations.x + y = 125
0.60x + 0.30y = (0.36)(125)

x + y = 125
0.60x + 0.30y = 45

solve for a variable in the first equation
y = 125 - x

plug into the second equation
0.60x + 0.30(125 - x) = 45
0.60x + 37.5 - 0.30x= 45
0.30x + 37.5 = 45
0.30x = 7.5
x = 25

plug the answer for x into the first equation
25 + y = 125
y = 100

If the density of an object is 8 g/cm cubed, and the mass is 200g. what is the volume of the object

Answers

Answer:

Step-by-step explanation:

To find the volume of an object, we can use the formula:

Volume = Mass / Density

Given that the density of the object is 8 g/cm³ and the mass is 200g, we can substitute these values into the formula to find the volume.

Volume = 200g / 8 g/cm³

Simplifying the expression:

Volume = 25 cm³

Therefore, the volume of the object is 25 cm³.

1. name a pair of congruent angles 2. name a pair of congruent segments
3. name a pair of perpendicular segments
4. name all rays parallel to CD