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2 years ago

Which express can be used to find the surface area of the following square pyramid.

Mathematics

2 answers:

skad [1K]2 years ago

8 0

Answer:I believe the answer is the last one d

Step-by-step explanation:

Have I got my answer to this is that I figured out how many fours were on our side was there for four so that equals 16 and then I figured out how many threes or worse that there is for threes which would equal to two sixes and then to six ended up with an equal up to 12 and such as the fours I did 4+4 is eight and then 8+8 is 1216 so the simplest form you can put in it is 16+12 and that’s how they got my answer

Harman [31]2 years ago

3 0

Answer: B: 16+6+6+6+6

Step-by-step explanation:

The area of the base is 16, the area of one triangle on the side is 6, there are four triangles in this prism so the expression should be 16+6+6+6+6

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The area of a rectangular wall of a barn is 144 square feet. Its length is 10 feet longer than the width. Find the length and wi

denpristay [2]

Answer:

8 feet

Step-by-step explanation:

Let l and w be length and width, respectively. Then:

lw=144 and

l=w+10

So:

w(w+10)=144

w²+10w-144=0

(w+18)(w-8)=0

w=8 as the width ................

3 0

2 years ago

If four times the sum of a number and 3 is divided by 2, the quotient is 0: find the number

AveGali [126]

The other number is -3.

Step-by-step explanation:

Step 1; First we develop formulae for the given information. A number is added with 3 and the resulting sum is multiplied by 4. This number is then divided by 2 and the quotient is 0. Assume the unknown number is x, then the given information is as follows

The quotient of $\frac{4(x+3)}{2}$ is 0. So $\frac{4(x+3)}{2}$ = 0.

Step 2; Now we solve the above equation. The denominator is taken to the RHS and the RHS remains zero.

$\frac{4(x+3)}{2}$ = 0, 4(x+3)= 0, 4x+ 12 = 0, 4x = -12, x = $\frac{-12}{4}$ = -3.

So the other number is -3.

3 0

3 years ago

An article in Knee Surgery, Sports Traumatology, Arthroscopy, "Arthroscopic meniscal repair with an absorbable screw: results an

igomit [66]

Answer:

Mean = 1.57

Variance=0.31

Step-by-step explanation:

To calculate the mean and the variance of the number of successful surgeries (X), we first have to enumerate the possible outcomes:

1) Both surgeries are successful (X=2).

$P(e_1)=0.90*0.67=0.603$

2) Left knee unsuccessful and right knee successful (X=1).

$P(e_2)=(1-0.9)*0.67=0.1*0.67=0.067$

3) Right knee unsuccessful and left knee successful (X=1).

$P(e_3)=0.90*(1-0.67)=0.9*0.33=0.297$

4) Both surgeries are unsuccessful (X=0).

$P(e_4)=(1-0.90)*(1-0.67)=0.1*0.33=0.033$

Then, the mean can be calculated as the expected value:

$M=\sum p_iX_i=0.603*2+0.067*1+0.297*1+0.033*0\\\\M=1.206+0.067+0.297+0\\\\M=1.57$

The variance can be calculated as:

$V=\sum p_i(X_i-\bar{X})^2\\\\V=0.603(2-1.57)^2+(0.067+0.297)*(1-1.57)^2+0.033*(0-1.57)^2\\\\V=0.603*0.1849+0.364*0.3249+0.033*2.4649\\\\V=0.1115+0.1183+0.0813\\\\V=0.3111$

3 0

2 years ago

Multiply: (4x^2+4x+1)by(2x^2+x-2)<br><br>no spam step by step explanation

klemol [59]

Answer:

the answer is 34

Step-by-step explanation:

first we put the equation together (4x^2+4x+1)by(2x^2+x-2)

so we multiply the formula together so we (4x^2+4x+1) (2x^2+-2) and that's how you get 34

8 0

2 years ago

Does this graph represent a function? Why or why not?

saw5 [17]

No because it does not pass the vertical line test,
meaning that a single vertical line could pass through multiple points on the graph.

7 0

2 years ago