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3 years ago

What is the surface area of the regular pyramid?

Mathematics

2 answers:

zimovet [89]3 years ago

5 0

You would have to do 18x2 then 14x2.

olga2289 [7]3 years ago

5 0

Answer:

Step-by-step explanation:

Surface area = $lw+l\sqrt{(\frac{w}{2})^2+h^2}+w\sqrt{(\frac{l}{2})^2+h^2}$

just put the values in the formula h=18,w=14,l=14

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Work out 1 3/4 x 4 1/6

sattari [20]

Convert mixed number to improper fraction:

$1\dfrac{3}{4}=\dfrac{1\cdot4+3}{4}=\dfrac{4+3}{4}=\dfrac{7}{4}\\\\4\dfrac{1}{6}=\dfrac{4\cdot6+1}{6}=\dfrac{24+1}{6}=\dfrac{25}{6}\\\\1\dfrac{3}{4}\times4\dfrac{1}{6}=\dfrac{7}{4}\times\dfrac{25}{6}=\dfrac{7\times25}{4\times6}=\dfrac{175}{24}=\dfrac{168+7}{24}=7\dfrac{7}{24}$

8 0

3 years ago

2. Kelsea needs a test average of at least 90 to get an "A-" this marking period in math. Her three test grades

Luda [366]

Answer:

Equation: 87 + 91 + 86 + x = 360

Solution: 264 + x = 360

x = 360 - 264

x = 96

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

First three Kelsea's test grades : 87, 91 and 86

2. What score must she get on her fourth test to receive at least an A- ?

Define variable: x that represents the grade needed by Kelsea on her fourth test to receive at least an A-

Equation: 87 + 91 + 86 + x = 360

Solution: 264 + x = 360

x = 360 - 264

x = 96

Now you can understand if the previous work you did is correct

6 0

3 years ago

Solve for g: 3/16=(-5/4)+g

Musya8 [376]

Answer:

g = 23/16

Step-by-step explanation:

3/16 = (-5/4) + g

g = 5/4 + 3/16

g = 23/16

7 0

3 years ago

2/3 a -1/6=1/3 Solve the equation

Taya2010 [7]

Step-by-step explanation:

a=3/4

3 0

3 years ago

Work out the gradient of the graph shown.

icang [17]

y=-3 and then x=-1 =-3:-1

4 0

3 years ago