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2 years ago

11

Help pls?? tysm if you do❤️

2 answers:

Soloha48 [4]2 years ago

8 0

U good big dawg bc u got the question right ong i believe in u dawg u my homie now btw

Gelneren [198K]2 years ago

7 0

Answer: i think u got it right

Step-by-step explanation: please mark brainlyest i really need it it is important

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30 points !!!!!!!!!!!! HELPPPP!!!!!!!!! SIMPLIFY THE EXPRESSION!!!!!!!!!!!<br><br><br>(9ab^-5)^-2

sergiy2304 [10]

Answer:

$\frac{ {b}^{10} }{ 81 {a}^{2} }$

Step-by-step explanation:

$(9ab^{-5})^{-2} \\ \\ = {9}^{ - 2} {a}^{ - 2} {b}^{ - 5( - 2)} \\ \\ = {9}^{ - 2} {a}^{ - 2} {b}^{10} \\ \\ = \frac{ {b}^{10} }{ {9}^{2} {a}^{2} } \\ \\ \huge = \frac{ {b}^{10} }{ 81 {a}^{2} }$

7 0

2 years ago

If x=2/3 and x=-3 are the roots of the equation ax^2+7x+b=0 find the values of a and b

Gnesinka [82]

<u>ANSWER: </u>

If x = $\frac{2}{3}$ and x = -3 are the roots of the equation, then values of a and b are 3, -6

<u>SOLUTION: </u>

Given, quadratic equation is $a x^{2}+7 x+b=0$ and its roots are -3 , $\frac{2}{3}$

We know that, for any quadratic equation of form $a x^{2}+b x+c=0$ with roots $x_{1} and x_{2}$ then,

Sum of roots $(x_{1} +x_{2})$ = $\frac{-b}{a}$

Product of roots ( $x_{1} \times x_{2})$ = $\frac{c}{a}$

Now, for given quadratic equation $x_{1}$ = -3 and $x_{2}$ = $\frac{2}{3}$

hence Sum of roots = $\frac{-7}{a}$

$x_{1} + x_{2} = \frac{-7}{a}$

$-3 + \frac{2}{3} = \frac{-7}{a}$

on solving we get "a" = 3

Now product of roots = $x_{1} \times x_{2} = \frac{b}{3}$

$-3 \times \frac{2}{3} = \frac{b}{3}$

b = -6

hence, the values of a and b are 3, -6.

7 0

3 years ago

Use the formula d = rt to find the value of the missing variable.<br> d = 130 feet, t = 26 seconds

swat32

D = rt
130ft = r(26sec)
130/26 = r
5=r

6 0

3 years ago

Shannon went to the candy store and bought 6 1/5 pounds of candy. If 5/6 of Shannon‘s candy was chocolate, how many pounds of ch

ladessa [460]

Answer:

5 11/30 pounds

Step-by-step explanation:

6 1/5=31/5

= 31/5 - 5/6 (LCM=30)

= 186/30 - 25/30

= 161/30

= 5 11/30 pounds.

Hope this is helpful. :)

4 0

3 years ago

Last year 64 new houses were built in the neighborhood so far this year 5/8 of them have been sold. How many new houses have bee

Mariana [72]

5/8 of the total has been sold, so we just do 64*5/8=40 houses that had been sold this year. Hope this helped!

7 0

3 years ago