Evaluate the expression using the values given for x and y. What is the result?

1 answer:

4 0

x(y) is the same as saying "x times y". The x and y are placeholders for numbers. Think of them like boxes to place a number inside. In this case, we place an "8" in the box labeled "x"; we also place a "23" in the box labeled "y"

So, x*y = 8*23 = 184

Answer: 184

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What is the axis of symmetry of h(x) = 5x2 40x 64?

kobusy [5.1K]

The axis of symmetry of h(x) = 5x2 + 40x + 64 = -4

The formula for calculating the axis of symmetry is expressed as:

Axis of symmetry x = -b/2a

h(x) = 5x^2 + 40x + 64

a = 5 and b = 40

5 0

2 years ago

Alessandro currently has $2,400 in his savings account. He saves $250 per month. Bea currently has $1,750 in her account. She sa

Flauer [41]

Bea has $550 more money than Alessandro after 12 months.
Explanation:
So let start with writing the equation for Alessandro money. So we know that the current amount in his/her bank account has $2,400 and she saves $250 per month. So the equation that best fit these terms is:
y
=
250
x
+
2
,
400
Bea has $1,750 in his/her bank account and saves $350 per month. So the equation that best fit these terms is:
y
=
350
x
+
1
,
750
So for x for both of these equations is 12. So let plug the number in
Alessandro:
y
=
250
(
12
)
+
2
,
400

y
=
3000
+
2400

y
=
$
5400
after 12 months
Bea:
y
=
350
(
12
)
+
1750

y
=
4200
+
1750

y
=
$
5950
after 12 months
So subtracting $5950 and 5400 gives us a $550

hope this helps :p

7 0

3 years ago

The interest rate r required to increase investment p to amount a in t years is found using the formula r=(a/p)^1-t - 1. Find th

valkas [14]

The interest rate would be 20%.

The formula is derived from the compound interest formula

$A=p(1+r)^t$ .

We want to isolate r in this equation to rewrite the formula. The first thing we would cancel, outside parentheses, would be p; divide both sides by p and we have

$\frac{A}{p}=(1+r)^t$

We want to cancel the exponent, t, next. We can raise a power to its reciprocal to undo it; for example, raising a squared amount to the 1/2 power will undo the exponent. We will raise both sides of this to the 1/t power:

$(\frac{A}{p})^{\frac{1}{t}}=1+r$

Now we cancel the 1 by subtracting, giving us

$(\frac{A}{p})^{\frac{1}{t}}-1=r$

Using this formula, we plug in 3600 for A, 2500 for p and 2 for t:

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The answer would consiste of c

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VladimirAG [237]

Answer:

I think she is correct !

Step-by-step explanation:

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3 years ago