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3 years ago

Amelia can type 60 words per minute. At this rate, how many minutes will it take her

Mathematics

2 answers:

Vitek1552 [10]3 years ago

8 0

12 minutes.

60*12=720 words

Hope this helped.

Elanso [62]3 years ago

8 0

12 minutes

Working out: 720/60 = 12

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Qual o resultado da subtração dos dois polinômios abaixo? (2x2 + 4x) (–2x2 + x – 6)

Len [333]

Answer:

-4x^4-6x^3-8x^2-24x

Step-by-step explanation:

$\left(2x^2+4x\right)\left(-2x^2+x-6\right)\\$

distribuir parênteses

$=2x^2\left(-2x^2\right)+2x^2x+2x^2\left(-6\right)+4x\left(-2x^2\right)+4xx+4x\left(-6\right)$

Aplicar regras de menos mais ; $+\left(-a\right)=-a$

$=-2\times\:2x^2x^2+2x^2x-2\times\:6x^2-4\times\:2x^2x+4xx-4\times\:6x$

simplificar

$-2\times\:2x^2x^2+2x^2x-2\times\:6x^2-4\times\:2x^2x+4xx-4\times\:6x:\\\quad -4x^4-6x^3-8x^2-24x$

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4 years ago

myra swims 3/5 of a mile farther than luke.if luke swims 2 and 4/10 miles, how many milrs does myra swim?

Irina-Kira [14]

The answer is 447 because you got to add 35 plus 410

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3 years ago

Which expression has an equivalent value to x^2 + 9x +8 for all values ofx?

marta [7]

The answer would be the first option (x+1)(x+8). You would use the foil method, which will give you the equivalent value of the expression.

Hope this helped

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3 years ago

Heather spent $138 on shirts. Fancy shirts cost $26 and plain shirts cost $15. If she bought a total of 7, then how many of each

Jlenok [28]

She bought about 3.5

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4 years ago

What is the length of NM?

MA_775_DIABLO [31]

Answer:

See below :)

Step-by-step explanation:

We know that these traingles are all similar. We can see the angle NMK is 60 degrees so we also know that JNK is 60 degrees. Now we know that all of the triangles are 30-60-90 triangles. JN is 3, so from the "leg opposite to 30 degree theorem", we know that NK is two times JN which is 6. Then from the same theorem, we know that NM is NK divided by the square root of 3

$\frac{6}{\sqrt3}$

We can't have fractions that have irrational numbers in the denominator of a fraction so we multiply it by root3 over root3

$\frac{6}{\sqrt3}$ * $\frac{\sqrt3}{\sqrt3}$

This then makes it 6 times root 3 over 3

$\frac{6\sqrt3}{3}$

We then get $2\sqrt{3}$

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4 years ago