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2 years ago

Layla borrowed some money from her friend in order to help buy a new video game

Mathematics

1 answer:

astra-53 [7]2 years ago

8 0

Answer:

hi hru can you be my friend

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Someone please help me figure this question out!!

rosijanka [135]

If you subtract 1.1 from 5.8 you will end up with 4.7
then you subtract 10^7 from 10^8 which will give you 10^1
then you add the seven back which will give you your answer of
4.7 10^8

3 0

3 years ago

The baker uses 3/4 cups of sugar for each cake. If the baker makes 2 cakes per week

GrogVix [38]

Answer:

6 cups of sugar

Step-by-step explanation:

3/4x2=1.5

1.5x4=6

6 0

3 years ago

If -2x+xy=30 and y=8,then what is the value of x?

Dafna1 [17]

-2x + xy = 30.....when y = 8

-2x + 8x = 30
6x = 30
x = 30/6
x = 5 <==

3 0

3 years ago

Read 2 more answers

Select the correct answer.

adoni [48]

The correct answer is b) 2

8 0

3 years ago

Convert the Cartesian equation (x 2 + y 2)2 = 4(x 2 - y 2) to a polar equation.

SashulF [63]

<u>ANSWER</u>

${r}^{2} = 4 \cos2\theta$

<u>EXPLANATION</u>

The Cartesian equation is

${( {x}^{2} + {y}^{2} )}^{2} = 4( {x}^{2} - {y}^{2} )$

We substitute

$x = r \cos( \theta)$

$y = r \sin( \theta)$

and

${x}^{2} + {y}^{2} = {r}^{2}$

This implies that

${( {r}^{2} )}^{2} = 4(( { r \cos\theta) }^{2} - {(r \sin\theta) }^{2} )$

Let us evaluate the exponents to get:

${r}^{4} = 4({ {r}^{2} \cos^{2}\theta } - {r}^{2} \sin^{2}\theta)$

Factor the RHS to get:

${r}^{4} = 4{r}^{2} ({ \cos^{2}\theta } - \sin^{2}\theta)$

Divide through by r²

${r}^{2} = 4 ({ \cos^{2}\theta } - \sin^{2}\theta)$

Apply the double angle identity

$\cos^{2}\theta -\sin^{2}\theta= \cos(2 \theta)$

The polar equation then becomes:

${r}^{2} = 4 \cos2\theta$

7 0

3 years ago