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yan [13]
3 years ago
10

Number 13 I don't get it

Mathematics
1 answer:
Ludmilka [50]3 years ago
3 0
Its neither because 1+2=3 but can't add 2 on 5+2=8 and for multiplying 1×3=3 but 5×3 does not equal 8
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45.
Valentin [98]

Answer:

Step-by-step explanation:

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inessss [21]

Answer:

volume = length×width×height

Step-by-step explanation:

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12×2×7 = 24×7 =168

box 2

9×2×5 = 10×9 = 90

total vloume = 168+90 = 258cubic inches.

8 0
4 years ago
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What is the sum?
RSB [31]
It is C) 2.55 because i was taught that you can subtract the negative from the positive. 5.35-2.8=2.55 and it is positive
5 0
3 years ago
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Simplify by rationalizing the denominator.<br> 15√2 / √270
ladessa [460]

\frac{ \sqrt{15} }{3} ✅

Step-by-step explanation:

\frac{15 \sqrt{2} }{ \sqrt{270} }  \\ \\ =  \frac{15 \sqrt{2} }{ \sqrt{270} }   \times  \frac{ \sqrt{270} }{ \sqrt{270} }  \\  \\=  \frac{15 \sqrt{2}  \times  \sqrt{270} }{270}  \\\\ (∵ \sqrt{a}  \times  \sqrt{a}  = a) \\\\  =  \frac{15 \sqrt{540} }{270}  \\  \\=  \frac{ \sqrt{2 \times 2 \times 3 \times 3 \times 3 \times 5} }{18}  \\ \\ =  \frac{ \sqrt{ {2}^{2} \times  {3}^{2}  \times 15 } }{18}  \\  =  \frac{2 \times 3 \sqrt{15} }{18}  \\ \\ =  \frac{6 \sqrt{15} }{18}  \\ \\ =  \frac{ \sqrt{15} }{3}

\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{♡}}}}}

7 0
3 years ago
Read 2 more answers
In△XYZ , XY¯¯¯¯¯¯=7in , YZ¯¯¯¯¯=5in , and XZ¯¯¯¯¯=4in . This triangle is reflected across the x-axis to result in △X'Y'Z' . Whic
ki77a [65]

Answer:

B

Step-by-step explanation:

Reflection is a transformation that preserves lengths.

Triangle XYZ, with side lengths XY = 7 in, YZ = 5 in, XZ = 4 in, is reflected across the x-axis to result in △X'Y'Z'.

This means that corresponding sides have the same lengths:

  • XY = X'Y' = 7 in;
  • XZ = X'Z' = 4 in;
  • YZ = Y'Z' = 5 in.

Find the perimeters of both triangles:

P_{XYZ}=XY+XZ+YZ=7+4+5=16\ in\\ \\P_{X'Y'Z'}=X'Y'+X'Z'+Y'Z'=7+4+5=16\ in

Hence, only option B is true.

8 0
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