Составим пропорцию
5625-115%
х-100%
х=4891
4891*12=58696
<span>Ответ: 58696
</span>
1. 20*10=200
2. 6*10=60
3. 50*4=200
4. 14*10=140
5. 28*5=140
6. 30*4=120
7. 200+200+140+60+140+120=860
1
(x²-14x-15)/(10-4x)>0
x²-14x-15=0
x1+x2=14 U x1*x2=-15
x1=-1 U x2=15
10-4x=0⇒4x=10⇒x=2,5
+ _ + _
----------------(-1)--------------(2,5)------------(15)-----------------------
x∈(-∞;-1) U (2,5;15)
2
11^5<11^(5x-1)
5x-1>5
5x>6
x>1,2
x∈(1,2;∞)
3
log_2(1/4)=-2
7^log_7(2)=2
-2*log_(1/8)81:2=-log(1/8)81=log(8)81=4/3*log(2)3
4
f`(x)=1/cos²(2x-π/4) *2=2/cos²(x-π/4)
f`(π/4)=2:cos²(π/4-π/4)=2:cos²0=2:1=2
9(х-15)=72
9х-135=72
9х=207
х=207:9
х=23