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cestrela7 [59]
3 years ago
7

* 20 points * help me please.?????........???!

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
3 0
y=ax^2+bx+c

A parabola is open up if a > 0.
The vertex formula: y=a(x-h)^2+k
(h; k) - the coordinates of the vertex
B.\ y=x^2+10x+24=x^2+2x\cdot5+24=x^2+2x\cdot5+5^2-5^2+24=(x+5)^2-1
Therefore h = -5 < 0
Answer: B. y = x² + 10x + 24.

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Brad has eight more nickels than quarters. Altogether he has $6.10. how many of each does he have
wlad13 [49]

Brad have 19 quarters and 27 nickels.

Step-by-step explanation:

Given,

Total worth of nickels and quarters = $6.10 = 6.10*100 = 610 cents

One quarter = 25 cents

One nickel = 5 cents

Let,

x represent the number of quarters.

y represent the number of nickels.

According to given statement;

25x+5y=610     Eqn 1

y = x+8              Eqn 2

Putting value of y from Eqn 1 in Eqn 2

25x+5(x+8)=610\\25x+5x+40=610\\30x=610-40\\30x=570

Dividing both sides by 30

\frac{30x}{30}=\frac{570}{30}\\x=19

Putting x=19 in Eqn 2

y=19+8\\y=27

Brad have 19 quarters and 27 nickels.

Keywords: linear equation, subtraction

Learn more about subtraction at:

  • brainly.com/question/9369548
  • brainly.com/question/9328925

#LearnwithBrainly

7 0
2 years ago
Solve for x:<br><br> 2(3x - 9) = 18x<br><br> x = -3/2<br><br> x = 3/2<br><br> x = 0<br><br> x = 6
Mila [183]
Remember yo can do anything to an equation as long as you do it to both sides

so
remember distributive property
a(b+c)=ab+ac

so first distribute
2(3x)+2(-9)=18x
6x-18=18x
minus 6x both sides
-18=12x
divide both sides by 12
-18/12=x
-9/6=x
-3/2=x

easier way is to first divide both sides by 2


x=-3/2
5 0
3 years ago
Read 2 more answers
Please resolve this is for today
Fynjy0 [20]

Answer:

A Square plus B square equals

Step-by-step explanation:

T

5 0
2 years ago
Simplify the expression. p(p^-7 q^3)^-2q^-3
FinnZ [79.3K]

Answer:

Step-by-step explanation:

7323

4 0
3 years ago
Suppose 150 students were surveyed.How many students chose math as their favorite subject?
Vsevolod [243]
First calculate the percentage of math.
100-23-30-15-12
=20%
then 150x20% for the math
=30 so there are 30 students chose math.
7 0
3 years ago
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