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2 years ago

What is (y-10)(4y+2)?

Mathematics

2 answers:

AleksandrR [38]2 years ago

8 0

Answer:

4y²−38y−20

Step-by-step explanation:

(y−10)(4y+2)

=(y+−10)(4y+2)

=(y)(4y)+(y)(2)+(−10)(4y)+(−10)(2)

=4y²+2y−40y−20

=4y²−38y−20

please mark me brainliest!

ryzh [129]2 years ago

3 0

Answer:

Step-by-step explanation:

$(y-10)(4y+2)\\ (a+b)(c+d)=ac+ad+bc+bd\\4y^2+2y-40y-20\\4y^2 -38y -20$

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Answer:

0.6x = 87

Step-by-step explanation:

Hi, to answer this question we have to write en equation:

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Mathematically speaking:

x (60/100) = 87

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Feel free to ask for more if needed or if you did not understand something.

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2 years ago

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Nostrana [21]

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2 years ago

Darin can purchase tile at a store for 0.79 per tile and rent a tile saw for $24. At another store, he can borrow the tile saw f

ankoles [38]

Let us denote the number of tiles by $T$ .

In the first store, if Darin bought $T$ tiles, he would need to spend:
                        $0.79\times T+24$ (measured in $)

In the second store, if Darin bought $T$ tiles, he would need to spend:
                        $1.19\times T$ (measured in $)

For the cost to be the same at both stores, it means (measured in $)
                                           $1.19T=0.79T+24$

Moving $0.79T$ over to the left hand side and changing signs:
                                            $1.19T-0.79T=24$
                                            $0.4T=24$
                                            $T= \frac{24}{0.4}$
                                            $T=60$ tiles

Let's check. If he buys 60 tiles in the first store, he spends:
      $0.79×60 + $24 = $47.40 + $24 = $71.40

If he buys 60 tiles in the second store, he spends:
                               $1.19×60 = $71.40

∴ Darin needs to buy 60 tiles for the cost to be the same at both stores.

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3 years ago