Answer:
7+5=12
Step-by-step explanation:
To calculate the mass number of an atom, you have to add the protons and the neutrons. We have 7 neutrons and 5 protons, so your mass number would be 12. Let me know if you have any further questions. :)
<em><u>Answer:</u></em>
x. a.
y. b
z. c.
<em><u>Step-by-step explanation:</u></em>
So from the middle column, we know that each row or colum must be -12 because 1 - 8 - 5. x + 1 - 12 should be = - 12, so x -11 = 12, so x = -1
For z, - 12 + 3 + z = -12, so z = -3
For y, y - 5 + z = -12, but we know z so we can plug in -3:
y - 5 - 3 = - 12
y - 8 = -12
so y must be -4
Answer:
.5x-7= 1 5/10
Step by step explanation:
For half of the number, .5 is equivalent to half. For “x” that’s the variable. You don’t know the variable, which is why it is used in the equation. You subtract 7 and set it to equal 1 5/10.
Hope this helped!
16b^12-3(-8b^12)=16b^12-(-24b^12)=40b^12
Answer:
24 and 4 cm radius.
Step-by-step explanation:
the rectangle has two 3cm sides and two 2cm sides, the 3cm is 6cm and cm is 4cm and the bar is 4cm so 4x6cm is 24cm an 4cm for the bar.