HELP MATH AHH URGENT PLS

Step-by-step explanation:

Area of a triangle: .5(b*h)

which means that

.5(4(x-1)*(2x+5))=30

mulitply the two equations

(4x-4)(2x+5) = 8x²+12x-20

distribute the 1/2

.5(8x²+12x-20)

4x²+6x-10 = 30

divide both sides by 2

2x²+3x-5= 15

move everything to one side

2x²+3x-20=0

not sure if you need to solve it but x= 2.5 or x= -4

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

pls mark as brainliest