3 years ago

I need help with both of these

Mathematics

1 answer:

jeka57 [31]3 years ago

8 0

Answer:

13x² - 19x + 23
-16x +17

Step-by-step explanation:

1 . (4x² - 9x + 16) + (7 + 9x² - 10x)

4x² - 9x + 16 + 7 + 9x² - 10x

13x² - 19x + 23

2 . (-2x + 6) - (14x - 11)

-2x + 6 - 14x + 11

-16x +17

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A car is moving 70 miles per hour. how far does it travel in 16 seconds

Serjik [45]

Answer:

0.311 miles

Step-by-step explanation:

Convert 16 seconds to hours :

16 /60×60

= 16÷3600

= .004444hrs

Distance = Speed × time

= 70 × 0.00444444

= 0.311 miles

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3 years ago

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Solve |3x - 4| = 6<br> please help me solve

Radda [10]

Step-by-step explanation:

|3x - 4| = 6

3x-4 = 6 or 3x-4 = -6

3x=6+4 3x=-6+4

3x=10 3x = -2

x= 10/3 x = -2/3

so, x1= 10/3 or x2 = -2/3

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3 years ago

#11 - In the diagram of triangle PST, QR is parallel to ST with PQ = 10 and

Goshia [24]

Answer:

<h2>The length of RT is 3.6 units.</h2>

Step-by-step explanation:

In the image attached, you can observe a representation of the problem.

Notice that we have two parallel lines with two transversal. That means we can use the proportionality theorem to create the following expression

$\frac{PQ}{QS} =\frac{PR}{RT}$

Where $PQ=10$ , $QS=4$ and $PR=9$ .

Replacing all values, and solving for the unknown quantity, we have

$\frac{10}{4}=\frac{9}{x} \\10x=36\\x=\frac{36}{10}\\ x=3.6$

$\therefore RT=3.6$

Therefore, the length of RT is 3.6 units.

4 0

3 years ago

1. A parking meter that is 1.6 meters (m) tall casts a shadow 3.6 m long. At the same time, a tree casts a shadow 9 m long.

mina [271]

Answer: B - 4.0

Step-by-step explanation:

$\frac{1.6}{3.6} =\frac{x}{9}$

(Cross multiply) $3.6x=14.4$

$\frac{3.6x}{3.6}=\frac{14.4}{3.6}$

$x=4$

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2 years ago

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A word that describes a noun is a _____.<br><br> modifier<br> verb<br> pronoun<br> all of the above

kakasveta [241]

Answer:

pronoun

Step-by-step explanation:

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2 years ago