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3 years ago

BÀI TẬP CHƯƠNG 1_T...2021 (1).pdf

Mathematics

1 answer:

ioda3 years ago

3 0

Answer:

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What is the approximate side length of each square

alexandr1967 [171]

Answer: $9\ units$

Step-by-step explanation:

You need to use the following formula for calculate the area of a square:

$A=s^2$

Where "s" is the lenght of any side of the square.

You know that the area of a mural is $81\ units^2$ . Then, you can substitute this area into the formula and solve for "s", in order to find the side lenght of the mural.

Therefore, this is:

$81\ units^2=s^2\\\\s=\sqrt{(81\ units^2)}\\\\s=9\ units$

8 0

3 years ago

<img src="https://tex.z-dn.net/?f=%5Csqrt%7B6y%2B7%7D%3D5%2B%5Csqrt%7By-3%7D%20%5C%5CI%20get%20how%20to%20begin%20this%20but%20h

PilotLPTM [1.2K]

Answer:

$\sqrt{6y+7} -\sqrt{y-3} =5\\(\sqrt{6y+7} -\sqrt{y-3} )^2=5^2\\\sqrt{6y+7} ^2+\sqrt{y-3} ^2-2\sqrt{(6y+7)(y-3)} =25\\6y+7+y-3-25=2\sqrt{(6y+7)(y-3)} \\7y-21=2\sqrt{(6y+7)(y-3)} \\(7y-21)^2=(2\sqrt{6y^2-18y+7y-21} )^2\\49y^2+441-294y=4(6y^2-11y-21)\\49y^2+441-294y=24y^2-44y-84\\49y^2-24y^2+441+84-294y+44y=0\\25y^2-250y+525=0\\25(y^2-10y+21)=0\\y^2-10y+21=0\\y^2-7y-3y+21=0\\y(y-7)-3(y-7)=0\\(y-7)(y-3)=0\\y-7=0 or y-3=0\\y=7 ,y=3$

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Doug's Pizza Shop sells pizza for $12plus $3per topping "t". Jake'sPizza Shop sells pizza for $17plus $2per topping "t". Write a

Nutka1998 [239]

Answer:

5 toppings

Step-by-step explanation:

Given that :

Doug's pizza:

Sales price of pizza :$12 plus

Topping (t) = $3 per topping

Jake's pizza:

Sales price of pizza :$17 plus

Topping (t) = $2 per topping

To make their pizza the same price, how many topping needs to be on a pizza of each

12 + 3t = 17 + 2t

3t - 2t = 17 - 12

t = 5

5 toppings each

8 0

3 years ago

Clarence saved 19% of the money he earned. If Clarence earned $90, how much did he save?

babunello [35]

He saved $17.1

Yes yes yes yes yes

8 0

3 years ago

A professor compares the number of students at his school majoring in statistics, engineering, both, or neither. If the number o

77julia77 [94]

Answer:

1,946

Step-by-step explanation:

251+175+1500+20=1,946

6 0

3 years ago