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2 years ago

9

Jimmy spent 55 minutes on solving 11 math questions. If it took him the same amount of time to solve each question how long woul

d it take to solve questions?

2 answers:

Eddi Din [679]2 years ago

6 0

It would take 5 minutes per question because if you divide 55 by 11 you get 5

FinnZ [79.3K]2 years ago

4 0

Answer:

5

Step-by-step explanation:

The problem is set up as 55/11.

55/11=5

Hope this helps!

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Choose the domain for which each function is defined

klemol [59]

Answer:

Part 1) $f(x)=\frac{x+4}{x}$ -----> $x\neq 0$

Part 2) $f(x)=\frac{x}{x+4}$ ----> $x\neq -4$

Part 3) $f(x)=x(x+4)$ ----> All real numbers

Part 4) $f(x)=\frac{4}{x^2+8x+16}$ ----> $x\neq -4$

Step-by-step explanation:

we know that

The domain of a function is the set of all possible values of x

Part 1) we have

$f(x)=\frac{x+4}{x}$

we know that

In a quotient the denominator cannot be equal to zero

so

For the value of x=0 the function is not defined

therefore

The domain is

$x\neq 0$

Part 2) we have

$f(x)=\frac{x}{x+4}$

we know that

In a quotient the denominator cannot be equal to zero

so

For the value of x=-4 the function is not defined

therefore

The domain is

$x\neq -4$

Part 3) we have

$f(x)=x(x+4)$

Applying the distributive property

$f*(x)=x^2+4x$

This is a vertical parabola open upward

The function is defined by all the values of x

therefore

The domain is all real numbers

Part 4) we have

$f(x)=\frac{4}{x^2+8x+16}$

we know that

In a quotient the denominator cannot be equal to zero

so

Equate the denominator to zero

$x^2+8x+16=0$

Remember that

$x^2+8x+16=(x+4)^2$

( $x+4)^2=0$

The solution is x=-4

so

For the value of x=-4 the function is not defined

therefore

The domain is

$x\neq -4$

6 0

2 years ago

Can anybody solve these two questions? Whoever gets it right gets brianleist.

qaws [65]

Answer:

7= 1

8= decimal : 0.00390625

try using symbolab.com

5 0

2 years ago

Read 2 more answers

Multiply.<br> (d+7)(d-7)<br> Simplify your answer.

romanna [79]

Answer:

$\huge\boxed{(d+7)(d-7)=d^2-49}$

Step-by-step explanation:

$\bold{METHOD\ 1:}\\\\(d+7)(d-7)\qquad|\text{use}\ (a+b)(a-b)=a^2-b^2\\\\=d^2-7^2=d^2-49\\\\\bold{METHOD\ 2:}\\\\(d+7)(d-7)\qquad|\text{use FOIL}\ (a+b)(c+d)=ac+ad+bc+bd\\\\=(d)(d)+(d)(-7)+(7)(d)+(7)(-7)\\\\=d^2-7d+7d-49\qquad|\text{combine like terms}\\\\=d^2+(-7d+7d)-49\\\\=d^2-49$

7 0

3 years ago

Destiny bought 10 1/2 yards of material for costumes for the city pageant she will use one and 140 yards of the material to make

Ray Of Light [21]

Answer:

She can complete 8 costumes

Step-by-step explanation:

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3 years ago

Super hero academy's ratio of boys to girls is 5:3. If 7th grade has 150,

UkoKoshka [18]

Answer:

94 boys and 56 girls.

Step-by-step explanation:

150/8 = 18.75 = x

b=x*5 = 94

g=x*3 = 56

b+g=150

8 0

2 years ago