cm²
Answer:
175 cm²
Step-by-step explanation:
Square: 7*7= 49 all of the triangles: A=h*b/2 9*7/2=31.5 *4= 126 so add them together 49+126= 175
Answer:
ok first off that's not the right answer the answer is 50
Step-by-step explanation:
when your trying to figure out surface area you add all the numbers that are there
We can write -
Cost of stool = $3
Cost of chair = $8
A mathematical expression is made up of terms (constants and variables) separated by mathematical operators. A mathematical equation is used to equate two expressions. Equation modelling is the process of writing a mathematical verbal expression in the form of a mathematical expression for correct analysis, observations and results of the given problem.
We have 6 stools and 4 chairs cost $58 but 5 stools and 2 chairs cost $35
Assume that the cost of a stool is $x and of a chair is $y. Then -
6x + 4y = 58 ..[1]
5x + 2y = 35 ..[2]
Eq[2] x 2, we get -
10x + 4y = 70 ..[3]
Eq[3] - Eq[1], we get -
10x - 6x = 70 - 58
4x = 12
x = 3
Cost of stool = $3
Cost of chair -
4y = 70 - 38
4y = 32
y = 8
Cost of stool = $3
Cost of chair = $8
Therefore, we can write -
Cost of stool = $3
Cost of chair = $8
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