Twice John’s age plus five times Claire’s age is 72. Claire is 2 times as old as John. How old is John?

Mathematics

1 answer:

lozanna [386]3 years ago

8 0

Answer: John is 6. Claire is 12.

Step-by-step explanation: 12 * 5 = 60. 6 * 2 = 12. 60 + 12 = 72.

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What is the product?

victus00 [196]

Answer:

$\begin{bmatrix}-2\\0 \end{bmatrix}$

Step-by-step explanation:

We have the product, $2\times \begin{bmatrix}-1\\0 \end{bmatrix}$ .

It is known that,

'When we multiply a scalar with a matrix, the scalar is multiplied by each element of the matrix'.

So, we get,

$2\times \begin{bmatrix}-1\\0 \end{bmatrix}$ .

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3 years ago

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The sum of Joy's age and her brother's age is 24. Joy's brother's age is 3 years older than twice joy's age. What is the differe

enyata [817]

Let Joy be x years old

<span>Joy's brother's age is 3 years older than twice joy's age.
</span>Joy's Brother = 2x + 3

<span>The sum of Joy's age and her brother's age is 24.
x + 2x + 3 = 24
3x + 3 = 24
3x = 24 - 3
3x = 21
x = 21 </span>÷ 3
x = 7

Joy:
x = 7

Brother:
2x + 3 = 2(7) + 3 = 17

Difference in their age = 17 - 7 = 10 years

They are 10 years apart.

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3 years ago

What is the slope of the shown picture?

elena55 [62]

Answer:

B. 2 is your answer

Step-by-step explanation:

You will use the slope formula to find the slope of the equation.

(3, 7) and (-2, -3) will be used.

7 and -3 are your y's. 3 and -2 are your x's.

(7 - (-3))/(3 - (-2)) = 10/5 = 2

B. 2 is your answer