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denis-greek [22]
3 years ago
14

I need help on this.

Mathematics
2 answers:
marta [7]3 years ago
8 0

Answer:

26.88 mm

Step-by-step explanation:

4.2 x 12.8 = 53.76/2 = 26.88

BlackZzzverrR [31]3 years ago
3 0

Answer:

28.3 i think

Step-by-step explanation:

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Two wires are attached 6 feet up a tree and 3 feet from the base of the tree. About how much TOTAL wire was used?
nalin [4]

Answer:

9 cm²

Step-by-step explanation:

Two wires are attached 6 feet up a tree and 3 feet from the base of the tree. About how much TOTAL wire was used?

We solve the above question, using the Area of a Triangle

Area = 1/2 × Base × Height

Area = 1/2 × 3 × 6

Area = 9 cm²

Therefore, the total wore that was used was 9cm² of wire

3 0
3 years ago
Solve equation, check for extraneous solutions
fiasKO [112]

Start with

1=\dfrac{1}{n^2}+\dfrac{n^2-4n-5}{3n^2}

We observe that both fractions are not defined if n=0. So, we will assume n \neq 0.

We multiply both numerator and denominator of the first fraction by 3 and we sum the two fractions:

1=\dfrac{3}{3n^2}+\dfrac{n^2-4n-5}{3n^2} = \dfrac{n^2-4n-2}{3n^2}

We multiply both sides by 3n^2:

n^2-4n-2=3n^2

We move everything to one side and solve the quadratic equation:

2n^2+4n+2=0 \iff 2(n^2+2n+1)=0 \iff 2(n+1)^2=0 \iff n+1=0 \iff n=-1

We check the solution:

1=\dfrac{1}{1}+\dfrac{1+4-5}{3} \iff 1 = 1+0

which is true

8 0
3 years ago
What’s the area of the triangle ??
qaws [65]

Answer:

7²

Step-by-step explanation:

3*2=6 6/2=3 6-2=4 4*2=8 8/2=4  4+3=7  

6 0
3 years ago
Read 2 more answers
What is 8 3/4 as a decimal
Agata [3.3K]
Here you go, The answer is 8.75
4 0
3 years ago
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What is 3% of $30.00?
CaHeK987 [17]
% means out of 100 so 1%=1/100

so 3%=3/100
$30.00=3000 cents
so you multiply 3/100 by 3000 =(3*3000)/100
you can cross out two zeros at the bottom and on the top and get
(3*30)/1 or 90/1 or 90 cents
3 0
3 years ago
Read 2 more answers
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