Asocial science book comprise of two sections: geography and civics in the ratio 4: 3. how much of each type of content will be needed to make a book of 490 pages?

i will mark u as brainest

280 and 210

Step-by-step explanation:

For every 4 pages there has to be three more

Therefore we divide the number of pages total by 7

= 70

Geography = 70 * 4 = 280

Civics = 70 * 3 = 210

We add these together to check we have the correct number of pages

We know that the ratio is 4:3 as we multiplied those numbers with 70 respectively

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

about 0.75 hours

step-by-step explanation: