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3 years ago

Please help me this is a hard problem

Mathematics

1 answer:

Levart [38]3 years ago

7 0

Step-by-step explanation:

$- 3y + 10 = x...(1) \\ 10x + 7y = - 38...(2) \\ from \: equations \: (1) \: and \: (2) \\ 10( - 3y + 10) + 7y = - 38 \\ - 30y + 100 + 7y = - 38 \\ - 23y = - 38 - 100 \\ - 23y = - 138 \\ y = \frac{ - 138}{ - 23} \\ \huge \red { \boxed{y = 6}} \\ substituting \: y = 6 \: in \: equation \: (1) \\ x = - 3 \times 6 + 10 = - 18 + 10 = - 8 \\ \huge \red { \boxed{x = - 8}} \\ \\ \: \: \huge \purple{ \boxed{(x, \: \: y) = ( - 8, \: \: 6)}}$

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while shopping for clothes, Tracey spent 38$ less than 3 times what Daniel spent. write and solve an equation to find how much D

alexandr1967 [171]

$\bold{\huge{\orange{\underline{Solution}}}}$

$\bold{\underline{ Given :- }}$

While shopping for clothes Tracey spent 38$ less than 3 times of what Daniel spent

$\bold{\underline{ To\: Find :- }}$

We have to determine the total cost spent by daniel

$\bold{\underline{ Let's \: Begin :- }}$

Cost spent by Tracey for her clothes = 38$

Let assume the spending by Daniel is x

$\bold{\underline{Therefore ,}}$

$\sf{ x / 3 = 38 }$

$\sf{ x = 38 × 3 }$

$\sf{ x = 114 dollar }$

$\sf{\red{ Hence,\: Daniel\: spent\: 114 \: dollars\: on \: His\: clothes }}$

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2 years ago

Determine if the product CA is defined. If the product is defined, state its dimensions. Do not calculate the product.

Troyanec [42]

ANSWER

The multiplication, CA is defined, and its dimension is 3×2

EXPLANATION

Matrix A is a 2x3 matrix.

Matrix C is a 3×2 matrix.

The product of the two matrices , CA, is defined if and only if the inner product of their dimension are the same.

$CA = (2 \times 3)(3 \times 2)$

The inner products are the same.

Hence the matrix multiplication, CA is defined and its dimension is the outer products.

$2 \times 2$

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3 years ago

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Step-by-step explanation:

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Step-by-step explanation:

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1 year ago

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bogdanovich [222]

Answer:

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Step-by-step explanation:

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3 years ago

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