3 years ago

What is the sum of the given polynomials in standard form?

Mathematics

1 answer:

stepladder [879]3 years ago

7 0

Answer:

-x^2 + 2x - 3.

Step-by-step explanation:

(x² – 3x) + (-2x² + 5x – 3)

= x² – 3x - 2x² + 5x – 3

= -x^2 + 2x - 3.

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John’s father is 5 times older than John and John is twice as old as his sister Alice. In two years time, the sum of their ages

oksano4ka [1.4K]

Answer:

John’s age is 8 years

Step-by-step explanation:

Let

x -----> John’s father's age

y -----> John’s age

z -----> John’s sister's age

we know that

$x=5y$ -----> equation A

$y=2z$

$z=y/2$ -----> equation B

$(x+2)+(y+2)+(z+2)=58$

$x+y+z+6=58$

$x+y+z=52$ -----> equation C

Substitute equation A and equation B in equation C and solve for y

$5y+y+y/2=52$

Multiply by 2 both sides to remove the fraction

$10y+2y+y=104$

$13y=104$

$y=8$

<em>Find the value of x</em>

$x=5(8)=40$

<em>Find the value of z</em>

$z=8/2=4$

therefore

John’s father's age is 40 years

John’s age is 8 years

John’s sister's age is 4 years

7 0

3 years ago

Aileen worked 35.5 hours last week. She earns $7.75 per hour. How much money did she make last week.

andrezito [222]

Answer:

275.125

Step-by-step explanation:

just multiply 35.5 with 7.75 and theres your answer

8 0

3 years ago

Which of the following does not belong with the other three? Explain your reasoning

Savatey [412]

???????????I don't know exactly what you mean

6 0

3 years ago

Which monomials are divisible by 6y^2?

kifflom [539]

Answer:

A) $12y^{3}$

Step-by-step explanation:

A) $\frac{12y^{3} }{6y^{2} }$

$=\frac{2y(6y^{2} )}{6y^{2}}$

= 2y

B) $\frac{24y}{6y^{2} }$

$=\frac{4}{y}$

Hence, $12y^{3}$ is divisible by $6y^{2}$ and the correct option is (A).

4 0

3 years ago

Read 2 more answers

power of a product property:states that if there is more than one factor in parenthesis,within exponent _______ the parenthesis,

8_murik_8 [283]

Answer:

The answers Outside

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3 years ago