Answer: it is a solution set
Step-by-step explanation:
The given system of simultaneous linear equations is expressed as
7x-3y=6 - - - - - - - - - -1
2x+y=11 - - - - - - - - - - - 2
We would eliminate x by multiplying equation 1 by 2 and equation 2 by 7. It becomes
14x - 6y = 12
14x + 7y = 77
Subtracting, it becomes
- 13y = - 65
Dividing the left hand side and the right hand side of the equation by - 13, it becomes
- 13y/13 = - 65/- 13
y = 5
Substituting x = 5 into equation 2, it becomes
2x + 5 = 11
Subtracting 5 from the left hand side and the right hand side of the equation, it becomes
2x + 5 - 5 = 11 - 5
2x = 6
Dividing the left hand side and the right hand side of the equation by 2, it becomes
x = 6/2 = 3
Correct option is A. Plan inadequately for their own needs
The porcupine women of this world is best described as those who do not prepare well or do not plan well for their own needs. "However, the story is not without morals for the female hedgehogs of this world.
Her stated purpose is to hunt, but she leaves without the three requisites of effort. this: a bag to carry his game at home, a needle to sew his intestines, and most importantly, a tool for hunting and self-defense." This excerpt supports the above claim. So A is the answer.
To learn more about porcupine women of this world from given link
brainly.com/question/26538476
#SPJ4
Answer:
I. Volume = 301.6 cm³ (to 1d.p)
II. CSA = 188.5 cm² (to 1d.p)
Step-by-step explanation:
<u>Given the following data;</u>
Height, h = 8cm
Radius, r = 6cm
Curved length = 10cm
a. To find the volume of the cone
Where;
- V is the volume of the cone.
- r is the radius of the base of the cone.
- h is the height of the cone.
Substituting into the equation, we have;
<em>Volume = 301.6 cm³</em><em> </em>(to 1d.p)
b. The curved surface area of the cone
Where;
- CSA is the curved surface area of the cone.
- r is the radius of the base of the cone.
- l is the curved length of the cone.
Substituting into the equation, we have;
<em>CSA = 188.5 cm²</em> (to 1d.p)
Answer: ∠DOB: 48°
Step-by-step explanation:
1. we need an equation first. the sum of all angles (108°, n°, 2n°) is equal to 180°. we can depict this with the equation: 108°+2n°+n°=180°
2. now we can solve for the missing variable, n.
108°+3n°=180° → subtract both sides by → 3n°=72° → divide both sides by 3 → n=24°
3. now that we know that n=24°, we can solve the value of ∠DOB. we can see that ∠DOB is 2n° which we just plug the number we got for n into the equation. 2*24=48° meaning ∠DOB is 48°
hope this heped! ♡
Answer:
Step-by-step explanation:
CH3Cl is polar while CCl4 is non polar.
When we consider whether something is polar or not we have to consider the following:
-Molecular symmetry
-Polar bonds (based on Electronegativity)
-Whether or not all the bonds are equal in magnitude
So for CCl4:
-All of the bonds are equal, in that all the electronegativity differences (delta EN) are the same.
-There are polar bonds as the delta EN between Cl (EN = 3.0) and C (EN=2.5) is 0.5 which means the bond is polar covalent
But when we look at the symmetry of the molecule (by drawing the lewis structure) there are no lone pairs, meaning that the molecule is symmetrical and therefore, it is non polar.
For CH3Cl:
-There are polar bonds here whether between C-H or C-Cl like above, both delta EN are greater than or equal to 0.5
-But, all of the bonds are not equal in strength. Cl (3.0) atoms have much higher electronegativity values than H (2.1) and there for they will "pull" the electrons closer and polarize the molecule. Therefore, the differences in bonds causes this molecule to be asymmetrical, and hence polar.
