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3 years ago

Another one: (12 - 7.5) - 7

Mathematics

1 answer:

mixas84 [53]3 years ago

5 0

Answer:

-2.5

Step-by-step explanation:

Plugged into calculator

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Factorise completely: 1. 3xy - x 2. 4a² - 9

Amanda [17]

Answer:

x(3y - 1) and (2a - 3)(2a + 3)

Step-by-step explanation:

(1)

3xy - x ← factor out x from each term

= x(3y - 1)

(2)

4a² - 9 ← is a difference of squares and factors in general as

a² - b² = (a - b)(a + b) , then

4a² - 9

= (2a)² - 3²

= (2a - 3)(2a + 3)

6 0

2 years ago

Which of the following shows all of the factor pairs of 28?

kow [346]

The factor pairs of a number when multiplied give the original number.

Therefore, all the factor pairs of 28 are:

$\begin{gathered} 1\times28; \\ 2\times14; \\ 4\times7 \end{gathered}$

The correct choice is the first one

4 0

1 year ago

What is the scale factor of triangle ABC to triangle XYZ?

Alex

9514 1404 393

Answer:

C. 6

Step-by-step explanation:

XY/AB = 30/5 = 6

Triangle ABC is scaled by a factor of 6 to make triangle XYZ.

5 0

3 years ago

Please tell me how you got it.

yawa3891 [41]

Answer-

$-70\%$

Solution-

The given data as follows,

$-70\%,\ 0.34,\ -\dfrac{2}{5},\ 0.96\%$

After converting all the percentages and fractions to decimal, we can compare them all.

For converting percentages to decimal to divide the number by 100, so

$-70\%=\dfrac{-70}{100}=-0.70,\\\\0.96\%=\dfrac{0.96}{100} =0.0096$

Then converting the fraction into decimal,

$-\dfrac{2}{5}=-\dfrac{2\times 20}{5\times 20}=-\dfrac{40}{100}=-0.40$

As, all the numbers are converted into decimal, now comparing all the numbers,

$-0.70$

$-70\%$

8 0

3 years ago

PLEASE HELP What is the slope of the line on the graph? Enter your answer in the box.

astra-53 [7]

Answer:

slope is 1/5

Step-by-step explanation:

Count how far right the point goes=1

count how far up the point goes =5

4 0

2 years ago