Ask question

Ask question

All categories

3 years ago

11

I don't know how to solve this.

1 answer:

Leona [35]3 years ago

5 0

What is the question?

You might be interested in

On Tuesday the temperature is 1 ºC. By Wednesday it has dropped to –2 ºC. The temperature drops by twice as much from Wednesday

Finger [1]

Answer: $-8^{\circ}C$

Step-by-step explanation:

Given

The temperature on Tuesday is $1^{\circ}C$

Temperature drops to $-2^{\circ}C$ on Wednesday

Net drop in temperature $1-(-2)=3^{\circ}C$

The temperature drops twice from Wednesday to Thursday

$\Delta T=2\times 3=6^{\circ}C$

Temperature on Thursday

$\Rightarrow -2-6=-8^{\circ}C$

3 0

2 years ago

Triangle a' B' c' is dilation of triangle abc about point p. Is this a reduction or enlargement<br>

Yuliya22 [10]

Enlargement

Hope this helps :)

8 0

3 years ago

Lady_Fox [76]

他們會被當了總統寶座的法老時代就開始有個去的話讓

5 0

2 years ago

Sparkles the Clown makes balloon animals for children at birthday parties. At Kelsey's party, she made 4 balloon poodles (x) and

Dafna1 [17]

Answer:

4x+5y=18

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

The equation x^2 + y^2 + 21 = 40 + 18y. What is the radius of this cookie?

trapecia [35]

Answer:

The radius is 10

Step-by-step explanation:

Given

$x^2 + y^2 + 21 = 40 + 18y.$

Required

The radius

Rewrite as:

$x^2 + y^2 - 18y = 40-21$

Subtract 81 from both sides

$x^2 + y^2 - 18y +81= 40-21+81$

Expand

$x^2 + y^2 - 9y - 9y +81= 40-21+81$

Factorize

$x^2 + y( y- 9) - 9(y -9)= 40-21+81$

Factor out y - 9

$x^2 + (y- 9) (y -9)= 40-21+81$

Express as squares

$x^2 + (y- 9)^2= 100$

$x^2 + (y- 9)= 10^2$

The equation of a circle is:

$(x - a)^2 + (y- b)= r^2$

By comparison:

$r^2=10^2$

$r = 10$

6 0

3 years ago