Answer:

Step-by-step explanation:
Given
Represent Goldfish with g and hermit crabs with h.
The first statement, we have:

The second statement, we have:

Required
Determine the selling price of 6 goldfish and 4 hermit crabs
The equations are:
--- (1)
--- (2)
Make g the subject in (2)


Divide both sides by 4

Substitute
for g in (1)



Multiply through by 4


Open bracket


Collect Like Terms


Make h the subject



Substitute 4 for h in 




This implies that:
1 goldfish = $2
1 hermit crab = $4
The cost of 6 goldfish and 4 hermit crabs is:




Answer:
140 units²
Step-by-step explanation:
1/2bh=
1/2(15-5)(30-2)=
1/2 (10)(28)=140
Answer:
You need 75 points.
Step-by-step explanation:
Giving the following information:
Total number of points= 510 + 100= 610 (100%)
Actual number of points= 493
<u>First, we need to determine the number of points required to reach 93%:</u>
Points required= 610*0.93
Points required= 567.3 = 568
<u>Now, the points needed in the final exam:</u>
Difference of points= 568 - 493
Difference of points= 75 points
You need 75 points.
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