Solve this system of equation: 5x + 2y = -15 2x - 2y =-6

Mathematics

1 answer:

ElenaW [278]2 years ago

7 0

The answer is x equals -3 and y equals 0

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3 friends are selling items at a bake sale. May makes $23.25 selling bread. Inez sells gift baskets and make 100 times as much a

Zigmanuir [339]

Answer:

May: $23.25

Inez: $2325

Jo: $232.5

Step-by-step explanation:

Inez makes 100 times as much as May. Since May makes $23.25, move the decimal point two places to the right to multiply the number by 100. You will get $2325. Jo makes 1/10 of the money Inez makes. Pretend there is a decimal point at the end of 2325. Move the decimal point one place to the left to divide by 10. You will get $232.5.

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anygoal [31]

$y = \sqrt{x}$ has only real solutions if x is not negative.

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3 years ago

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Elza [17]

Answer:

the answer would be A

Step-by-step explanation:

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Complete the three-by-three magic square (that is,the sums of the numbers in each row, in each column and in each of the diagona

lara [203]

$\displaystyle\\\text{We will use numbers from 1 to 9.}\\\\1+2+3+4+5+6+7+8+9=\frac{9(9+1)}{2}=\frac{9\times10}{2}=\frac{90}{2}=\boxed{\bf45}\\\\\text{the sums of the numbers in each row, in each column are }=\frac{45}{3}=\boxed{\bf15}\\\\\text{Solution:}\\\\\boxed{\,2\,}\boxed{\,7\,}\boxed{\,6\,}\\\boxed{\,9\,}\boxed{\,5\,}\boxed{\,1\,}\\ \boxed{\,4\,}\boxed{\,3\,}\boxed{\,8\,}\\\\\text{Convenient rotation of the square gives 8 solutions.}$

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Write the number in two other forms 15,409

Katen [24]

There are several other was to write this number:

In words: Fifteen Thousand, Four Hundred and Nine.
In scientific notation: $1.54\times10^{4}$
In binary: 0b11110000110001
In hexadecimal: 0x3C31
In prime factorization: $15,409=19\times811$

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2 years ago