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2 years ago

On a map, 12 inch represents 45 mile.

Mathematics

2 answers:

Vera_Pavlovna [14]2 years ago

6 0

5/8 i believe is correct

jasenka [17]2 years ago

3 0

Use a proportion.

12 in. is to 45 miles as x is to 1 mile.

12/45 = x/1

x = 12/45 = 4/15

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Rhonda has $13. She has one $5 bill, three $1 bills, and one other bill. Is a other bill a $1 bill or a $5 bill explain

morpeh [17]

Answer:

$5 bill

Step-by-step explanation:

If Rhonda has $13 and she has a $5 bill and 3 $1 bills, then she has

5 + 3(1) + x = 13

5 + 3 + x = 13

8 + x = 13

x = 5.

The last bill must be a $5 bill to equal the remaining $5.

8 0

2 years ago

The temperature was 2° below zero the temperature drops by 5° what is the temperature now

Law Incorporation [45]

-2° was the initial temperature as it dropped to -5°
-2-5=-7
Hope this helped

4 0

2 years ago

Diego is solving the equation x^2-12x = 21

uysha [10]

Answer:

The solutions to the quadratic equations will be:

$x=\sqrt{57}+6,\:x=-\sqrt{57}+6$

Step-by-step explanation:

Given the expression

$x^2-12x\:=\:21$

Let us solve the equation by completing the square

$x^2-12x\:=\:21$

Add (-6)² to both sides

$x^2-12x+\left(-6\right)^2=21+\left(-6\right)^2$

simplify

$x^2-12x+\left(-6\right)^2=57$

Apply perfect square formula: (a-b)² = a²-2ab+b²

i.e.

$x^2-12x+\left(-6\right)^2=\left(x-6\right)^2$

so the expression becomes

$\left(x-6\right)^2=57$

$\mathrm{For\:}f^2\left(x\right)=a\mathrm{\:the\:solutions\:are\:}f\left(x\right)=\sqrt{a},\:-\sqrt{a}$

solve

$x-6=\sqrt{57}$

add 6 to both sides

$x-6+6=\sqrt{57}+6$

Simplify

$x=\sqrt{57}+6$

also solving

$x-6=-\sqrt{57}$

add 6 to both sides

$x-6+6=-\sqrt{57}+6$

Simplify

$x=-\sqrt{57}+6$

Therefore, the solutions to the quadratic equation will be:

$x=\sqrt{57}+6,\:x=-\sqrt{57}+6$

5 0

2 years ago

D = 7 mm Calculate the radius of the circle.

Vikentia [17]

Answer:

r= d/2

7/2

3.5

3.5 is the answer

Step-by-step explanation:

5 0

2 years ago

Plz plz plz help me with this

AnnZ [28]

Answer:

m∠A = 65°

Step-by-step explanation:

Opposite angles of the quadrilateral add up to 180.

This means x + 148 = 180 -> x = 32.

m∠A = 2x + 1 -> 2(32) + 1

m∠A = 65°.

4 0

2 years ago