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2 years ago

Which linear system has the solution (6, 6)

Mathematics

2 answers:

Stells [14]2 years ago

8 0

B: x+y=12 3x-2y=6
6+6=12 (3×6)-(2×6)=6

krok68 [10]2 years ago

6 0

By substituting x = 6 and y = 6 into the options we have that the correst answer is option B.

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you have 200 grams of a radioactive kind of iodine how much will ne left after 120 days if its half life is 60 days?

ElenaW [278]

By definition, the half life is a quantity is the time it takes to lose half of that quantity.

So, if the half life is 60 days, it means that after 60 days you have lost half the initial amount, i.e. you're left with 100 grams.

After another 60 days, you've lost, again, half of that amount, so you're left with 50 grams.

In other words, every time a half life period passes, you're left with half the quantity you had at the beginning of that period.

So, after two half-life periods (i.e. 120 days), you'll have half of the half of the initial quantity, i.e. one quarter.

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2 years ago

Doris uses 6 square pieces of fabric to make one scarf. Each side of a square piece of fabric is one third yard in length. Doris

brilliants [131]

Answer:

5 large pieces of fabric.

Step-by-step explanation:

Length of each side of a square piece of fabric = $\frac{1}{3}$ yard

Area of a Square = Length X Length

Area of one square piece of fabric = $\frac{1}{3}$ X $\frac{1}{3}$ = $\frac{1}{9}$ square yard.

To make one scarf, Doris uses 6 square pieces.

Area of one scarf = $6 X \frac{1}{9}= \frac{6}{9}=\frac{2}{3}$ square yard

Each large pieces of fabric is one-third yard long and 2 yards wide.

This is clearly a rectangle,

Area of a Rectangle = Length X Width

Area of each large piece of fabric= $\frac{1}{3}X 2=\frac{2}{3}$ square yard.

Since the Area of one scarf is equal to the area of each large piece of fabric, in order to make 5 scarves, Doris would need 5 large pieces of fabric.

7 0

2 years ago

Read 2 more answers

Help please I will mark brainliest!

ruslelena [56]

Answer:

multiply 8 x 4=22

Step-by-step explanation:

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3 years ago

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Question 15 of 20 :

musickatia [10]

Answer:

the answer is A

Step-by-step explanation:

$\frac{x}{2} = 17$

$x = 17 \times 2$

$x = 34$

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2 years ago

What is the -2 squared -2

oksano4ka [1.4K]

Answer: the answer is negative one over four

-1/4

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3 years ago