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mars1129 [50]
3 years ago
6

What is measure of angle D?pls provide explanation​

Mathematics
1 answer:
liubo4ka [24]3 years ago
8 0
130 (hsjdjcjcjdjjxxjxjjxjzjsjsjsjak)
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Amanda is having new tile installed in her kitchen. TileAll charges a flat fee of $378.00 plus $15.00 per tile. Kitchen Plus cha
myrzilka [38]

Answer:

C = 495 + 13.05x

60 tiles.

Step-by-step explanation:

$15.00 per tile plus a flat fee of $378.00 that charges Tile All.

Therefore, for x number of tiles, the total cost of installation will be  

C = 378 + 15x ........... (1)

Again, $14.50 per tiles plus a flat fee of $550.00 that charges Kitchen Plus. Amanda has at Kitchen Plus, a 10% discount coupon.

Therefore, for x tiles installation the charges will be  

C = (550 + 14.5x)(1 - \frac{10}{100}) = 495 + 13.05x .......... (2) (Answer)

Now, if for x number of tiles both the company charges the same, then  

378 + 15x = 495 + 13.05x (From equations (1) and (2)}

⇒ 1.95x = 117

⇒ x = 60 tiles. (Answer)

3 0
3 years ago
Which number is a solution of the inequality?
padilas [110]

we know that

A number is an inequality solution if the number satisfies the inequality

<u>Part 1)</u> 10.6 < b

rewrite the inequality

b > 10.6

The answer Part 1) is the option D 14

Because  14 satisfies the inequality

14 > 10.6 -----> is true

<u>Part 2)</u> m > 7/12

The answer Part 2) is the option A 1

Because  1 satisfies the inequality

1 > 7/12 -----> is true

<u>Part 3)</u> 8< x(7-x)

we're going to verify every case

<u>case A)</u> For x=2

substitute the value of x in the inequality

8< 2(7-2)

8< 10 ------> is true

therefore

The number 2 is a solution

<u>case B)</u> For x=8

substitute the value of x in the inequality

8< 8(7-8)

8< -8 ------> is not true

therefore

The number 8 is not a solution

<u>case C)</u> For x=-1

substitute the value of x in the inequality

8< -1(7-(-1))

8< -8 ------> is not true

therefore

The number -1 is not a solution

<u>case D)</u> For x=0

substitute the value of x in the inequality

8< 0(7-0)

8< 0 ------> is not true

therefore

The number 0 is not a solution

therefore

The answer Part 3) is the option A 2

6 0
3 years ago
Read 2 more answers
The opening course of the Dog Olympics involves the dogs running over a parabolic
Lemur [1.5K]

Answer:

x=13 feet

Step-by-step explanation:

A ramp is between 1.96 and 1.80 feet, we will take 1.96

If R(x) =-0.05x+0.8x and R(x)=1.96 feet: we apply quadratic formula; \frac{-b+-\sqrt{b^{2} -4ac} }{2a}, where a=-0.05, b=0.8 and c=-1.96, so

\frac{-0.8+-\sqrt{0.8^{2}-4*(-0.05)*(-1.96) } }{2*(-0.05)}, solving x_{1}=13 ; x_{2} = 3,02; we take the highest value of x, x=13

8 0
3 years ago
Determine whether quantities vary directly or inversely and find the constant of variation.
insens350 [35]
This is a problem in direct variation.  For every five minutes that goes by, Liz utters 225 words.  The general form of an equation of direct variation is 

w = k x, where w is the # of words, k is the constant of proportionality and x is the number of minutes that have elapsed.

Find k by dividing 225 words by 5 minutes, to find the number of words per minute.

Next:  How many minutes are there between 10:30 a.m. and 11:15 a.m.?  Calculate w=kx, using your constant of proportionality, k, and that number of minutes.
7 0
3 years ago
Sal was tired of waiting for Amir to show up at their meeting place, so he started running at an average speed of 4.5 mph withou
strojnjashka [21]

27 minutes (0.45 hours)

4 0
3 years ago
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