7-4 (d-3)=23
7-4d+12=23 **multiply -4 with (d-3)***
7+12-4d=23
19-4d=23
-4d=23-19
-4d=4
d=4÷-4
d= -1
Answer:
a): A line has a total degree of 180. So just subtract it. 180-92 is
y=88
b): Similar to the previous, a right angle has a total angle of 90. 90-45=45.
y=45.
These are all the ones I can figure out. I hope someone else can get c) and d).
<span>35%
<span><span><span><span><span>
To compare two whole numbers to find a percent, divide the first number by the second number:
224/640 = 0.35.
Multiply the dividend by 100 to get a percent.
0.35 x 100 = 35%.</span></span></span></span></span></span>
X+y=15
2x+3y=37
15-x=y
2x+3(15-x)=37
2x+(45-3x)=37
2x-3x+45=37
-1x=-8
x=8
x is the amount of bikes, so there are 8 bikes. 8x2=16.
37-16=21
21/3=7
There are 7 tricycles.
<span>The 2 factors of 24 that add up to 11 are 3 and 8. We know that 3 and 8 are also both factors of 24 because 3x8=24.</span>
