Answer:
(A) my friend
Step-by-step explanation:
please mark Brainliest because the other answer above me is wrong
Let Q= the number of quarters and D= the number of dimes.
Q+D= 40 coins
0.25Q+0.1D= $7.75
Rewrite equation 1 as: D = 40-Q and substitute into equation 2
0.25Q+0.1(40-Q)= 7.75 Simplify the left side
0.25Q+4-0.1Q= 7.75 Subtract 4 from both sides
0.25Q-0.1Q= 3.75 Convime like terms on left side
0.15Q= 7.75 Divide both sides by 0.15
Q=25 and D= 40-Q
D= 40-25 which is 15
So Jenna had 25 quarters and 15 dimes.
<span>To check multiply 25 x 25 and 15x10 which equals 625 and 150 this equals 775 so this is 7.75</span>
Answer:
C).<em> The term needs to be converted so it has a common denominator before adding it to the left side of the equation to balance the equation.</em>
Step-by-step explanation:
Hope this helps! :)
Answer:
The centroid of a triangle is also the center of gravity of the triangle.
Step-by-step explanation:
The centroid or the center of gravity of a triangle is that point through which all the mass of a triangle balances. We can also call it the call it the center of mass. Also, the centroid is the point, where the triangle's medians intersect.
Therefore, the correct answer is option A.
Answer:
11.78
Step-by-step:
78x + 8x + 12x + 20x + 28x
78x + 32x + 28x
= 138x
1626.35/138
= 11.78
