lauren9469
02.03.2021 •
Mathematics
Mrs. Monyei’s family is going on a road trip across Saudi. The car tank can fit 63 liters of gas. Every day the car uses 4 liters of gas. A light comes on when the remaining gas is 7 liters or less. Starting from a full tank, can Mrs. Monyei’s family drive the car for 12 days without the warning light coming on? Explain or show your reasoning. Starting from a full tank, can Mrs. Monyei's family drive the car for 18 days without the warning light coming on? Explain or show your reasoning. Write and solve an equation to determine the number of days Mrs Monyei can drive the car without the warning light coming on.
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Ответ:
and
Step-by-step explanation:
Let us assume that the coordinates of a and c are respectively and , and the coordinates of point b are .
So, we have to express the coordinates of b in terms of the coordinates of a and c provided the ratio of segment ab to bc is 3 : 1.
Now, we know, the formula of coordinate geometry that if there are two known points P and Q and the point R divides PQ line segment in m : n ratio internally, then the coordinates of R will be given by .
Therefore, using this formula we can write
and
(Answer)