4 years ago

A science test, which is worth 100 points, consists of 24 questions. Each question is worth either 3 points or 5 points. If x is

Mathematics

1 answer:

mash [69]4 years ago

3 0

Answer: B

Step-by-step explanation:

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A group of students are planning a mural at a wall the rectangular wall has dimensions of (6x+7) by (8x+5) and they are planning

zvonat [6]

Answer: $46x^2+73x+15$

Step-by-step explanation:

The area of a rectangle can be calculated with the formula:

$A=lw$

l: the length of the rectangle.

w: the width of the rectangle.

The area of the remaning wall after the mural has been painted, will be the difference of the area of the wall and the area of the mural.

Knowing that the dimensions of the wall are $(6x+7)$ by $(8x+5)$ , its area is:

$A_w=(6x+7)(8x+5)\\\\A_w=48x^2+30x+56x+35\\\\A_w=48x^2+86x+35$

As they are planning that the dimensions of the mural be $(x+4)$ by $(2x+5)$ , its area is:

$A_m=(x+4)(2x+5)\\\\A_m=2x^2+5x+8x+20\\\\A_m=2x^2+13x+20$

Then the area of the remaining wall after the mural has been painted is:

$A_{(remaining)}=A_w-A_m\\\\A_{(remaining)}=48x^2+86x+35-(2x^2+13x+20)\\\\A_{(remaining)}=48x^2+86x+35-2x^2-13x-20\\\\A_{(remaining)}=46x^2+73x+15$

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4 years ago

the total cost for two items is $19 is the difference in the cost of the two items is $5 find the cost of each item.

lora16 [44]

Ok so you spent 19 dollars the difference between prices is 5 dollars and your answer would be 12 and 7. If you need any help let me know.

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3 years ago

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Which of the following climates regions tends to have short grasses and shrubs that receive little rain A.tropical wet and dry B

GREYUIT [131]

Semiarid,

Source: Quizlet Science lesson 21 Climate Regions

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3 years ago

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If triangle ABC is reflected over the x-axis, rotated 180 degrees, and reflected over the y-axis, where will point B' lie? (5

11Alexandr11 [23.1K]

Answer:

(-7, 2)

Step-by-step explanation:

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3 years ago

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X + 67 = 70 <br><br> what does "x" equal?<br><br> Please explain your answer, thanks!

8_murik_8 [283]

Hey there!

3 + 67 = 70,

so your answer will be:
x = 3

Hope this helps!
Have a great day (:

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4 years ago

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