3 years ago

What are the answers for these questions 1,2,&3

Mathematics

1 answer:

ValentinkaMS [17]3 years ago

6 0

1fyjoite yuuic hyrsd hui

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I am not too sure if I got this right. Can someone double check for me? Will mark brainly.

Vadim26 [7]

Answer:

you are correct

Step-by-step explanation:

5 0

3 years ago

Y = x² + 7x - 5 Can be written in the form y = ( x + a )² + b. Find the value of a and the value of b.

Mamont248 [21]

Answer:

$a=\dfrac{7}{2} \\\\b=\dfrac{49}{4} \\$

Step-by-step explanation:

$y=x^2+7x-5\\\\=x^2+2*\dfrac{7}{2}*x +\dfrac{49}{4} -\dfrac{49}{4} -\dfrac{20}{4} \\\\=(x+\dfrac{7}{2} )^2+\dfrac{69}{4} \\\\a=\dfrac{7}{2} \\\\b=\dfrac{49}{4} \\$

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3 years ago

5:15 as a equivalent ratio

natima [27]

Answer:

1:3

Step-by-step explanation:

5 is 1/3 of 15

hope this helps! :)

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3 years ago

Whats 20% of 40?<br> (find the percentage of the whole)<br> im also giving brainliest!!!

Nataliya [291]

0.2 x 40
=8
(change the percentage to a decimal)

6 0

3 years ago

-1/2x+2=-x+7 i need to know

ludmilkaskok [199]

$= \frac{ - 1}{ \: \: 2} x + 2 = x + 7$

$= \frac{ - 1}{ \: \: \: 2} x + 2 - x = 7$

$= \frac{ - 3}{ \: \: \: 2}x + 2 = 7$

$= \frac{ - 3}{ \: \ \: 2}x = 7 - 2$

$= \frac{ - 3}{ \: \: \: 2} x = 5$

$x = 5 \: \div \frac{ - 3}{ \: \: \: 2}$

$x = 5 \times \frac{ \: \: \: 2}{ - 3}$

$x = \frac{ - 10}{ \: \: \: 3}$

$∴ \frac{ - 1}{ \: \: \: 2} \times \frac{ - 10}{ \: \: \: 3} = \frac{ - 10}{ \: \: \: 3} + 7$

6 0

4 years ago