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3 years ago

7

Solve to find the value of x.

2 answers:

aleksley [76]3 years ago

5 0

135
cross multiply 9*20 then divide by 8

marin [14]3 years ago

4 0

Cross multiplies 8x=1080. x=1080/8. x= 135

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Pleaseeeeeeeeeeee

Karo-lina-s [1.5K]

$\text{The scientific notation:}\\\\a\times10^n\\\\1\leq a$

$a.\\(5\times10^3)\times(3.5\times10^{-1})=(5\times3.5)\times(10^3\times10^{-1})\\\\=15.75\times10^{3+(-1)}=15.75\times10^2=1.575\times10\times10^2\\\\=1.575\times10^{1+2}=\boxed{1.575\times10^3}$

$b.\\(8\times10^2)\div(4\times10^3)=(8\div4)\times(10^2\div10^3)=2\times10^{2-3}\\\\=\boxed{2\times10^{-1}}$

$c.\\(6\times10^{-3})^2=6^2\times(10^{-3})^2=36\times10^{-3\cdot2}=36\times10^{-6}=3.6\times10\times10^{-6}\\\\=3.6\times10^{1+(-6)}=\boxed{3.6\times10^{-5}}$

$Used:\\\\a^n\times a^m=a^{n+m}\\\\a^n\div a^m=a^{n-m}\\\\(a^n)^m=a^{n\cdot m}$

5 0

3 years ago

Help #2-8 please thank you !

lapo4ka [179]

2. $1.75
3. $1.65
4. $1.05
5. $1.55
6. $1.20
7. $1.50
8. $1.29

3 0

2 years ago

One number is six more than the other number . thesum of their squares is 90

Andreyy89

Answer:

the answer is 3 and 9. 9 is 6 greater than 3 and 9 squared and 3 squared added up give you 90.

7 0

1 year ago

Edward's school is 132 miles away from his home . He goes by car to school and back. The car consumed 4 gallons of gas taking hi

mixer [17]

Total distance is 132 miles x 2 times/day x 5 days = 1320 miles
That used 4 gallons of fuel, so 1320 miles/4 gallons = 330 miles per gallon

5 0

3 years ago

Find the slope of the line shown. <br><br> A) 2/9<br><br> B) 2/5<br><br> C) 1/5<br><br> D) -3/8

Effectus [21]

The answer is A

Hopes it helps!

8 0

2 years ago

Read 2 more answers