2 years ago

Please help! I think I know the answer but I don't trust myself xD (Theres a screenshot attached)

Mathematics

2 answers:

AleksAgata [21]2 years ago

3 0

Answer:

the second one

Step-by-step explanation:

tigry1 [53]2 years ago

3 0

Answer:

The last one

Explanation:

-7 times 2 will be -14 and -7 times 5d would be -35d which is exactly what they ask for

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Multiples of 30: 2, 3, 5, 6, 10, 12, 15

For perimeter c = 30- (a+b)

C= sqrt( a^2 + b^2)

Using the possible combinations of the above:

5 and 12:

C = sqrt(5^2 + 12^2) = 13

5 + 12 + 13 = 30 for the perimeter

Area = 1/2 x 5 x 12 = 30

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charle [14.2K]

Answer:

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Step-by-step explanation:

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$\begin{pmatrix}x&y\\ -1&4\end{pmatrix}\begin{pmatrix}2&5\\ 4&1\end{pmatrix}$

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$=\begin{pmatrix}18&0\\ 14&-1\end{pmatrix}$

$\begin{bmatrix}x\times \:2+y\times \:4=18\\ 5x+y=0\end{bmatrix}$

$x=-1$

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<u>OAmalOHopeO</u>

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a) 45

Step-by-step explanation:

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Step-by-step explanation:

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