3 years ago

When combining like terms what is -9a + a?

Mathematics

2 answers:

Darina [25.2K]3 years ago

7 0

Answer:

-8a

Step-by-step explanation:

crimeas [40]3 years ago

6 0

Answer:

-8a

Step-by-step explanation:

This is because -9a is a negative and when you add a higher negative to a lower positive, the term will be a negative. I the same even if you switch it around.

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7 times as much as the sum of 1/3 and 4/5

Vlada [557]

$7( \frac{1}{3} + \frac{4}{5} )$

$=7( \frac{1(5)}{3(5)} + \frac{4(3)}{5(3)} )$

$=7( \frac{5}{15} + \frac{12}{15} )$

$=7( \frac{17}{15})$

$=\frac{7}{1} ( \frac{17}{15})$

$=\frac{119}{15}$

$= 7\frac{14}{15}$ ≈ 7.93

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3 years ago

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Knitting a scarf. On average she can knit 2 mm in 35 minutes. Express this as a rate in mm/min

Natali5045456 [20]

Answer:

she can knit 1mm/17.5min or she can knit 1mm in 17 minutes and 30 seconds.

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2 years ago

Multiplying monomials and binomials

lubasha [3.4K]

Answer:

$28w^2-476w$

Step-by-step explanation:

The general rule we are going to use to multiply this out is the distributive property. Which is:

a(b+c) = ab + ac

<u>Note:</u> x * x = x^2

Now multiplying, we get:

$28w(w-17)\\=28w*w-28w*17\\=28w^2-476w$

This is the multiplied out form, answer.

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3 years ago

What is the equation in point slope form of a line that passes through the point (–8, 2) and has a slope of 1/2?

Kamila [148]

Point slope equation:
y-y1=m(x-x1)
m=slope

So we simply plug in our given information:
x1=-8
y1=2
m=1/2

y-2=1/2(x-(-8)

2 minus signs next to each other make a positive

Final answer:
y-2=1/2(x+8)

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