3 years ago

Evaluate z + z + z for x = 2, y = -3, z = -4. 12 -12 -9 -6 Need help!!

Mathematics

1 answer:

Nataly_w [17]3 years ago

4 0

I think the answer is -12

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If x+1/x=7,find x^2+1/x^2

trapecia [35]

Answer:

x²+1/x² = 51

Explanation:

Given x - 1/x = 7 ---(1)

We know the algebraic identity:

a²+b²-2ab = (a-b)²

a²+b² = (a-b)²+2ab

Now,

x²+1/x²

= (x-1/x)²+2*x*(1/x)

= (x-1/x)²+2

:7²+2 [ from (1)] =

= 49+2

= 51

Therefore,

x²+1/x² = 51

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2 years ago

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Mila [183]

<1=97°

steps:

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2 years ago

What is the reciprocal of 1 3/5

JulsSmile [24]

Answer:

5/13

Step-by-step explanation:

All you have to do is switch the numerator and denominator! Hope this helps!

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3 years ago

If f(x)=4x+8 find f(5) f means function

Yakvenalex [24]

The answer i pretty sure would be 3x

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3 years ago

19. Heather invests $4,900 in an account with a 3.5% interest rate, making no other deposits or withdrawals. What will Heather’s

denis-greek [22]

Answer:

$\$5,828.28$

Step-by-step explanation:

we know that

The compound interest formula is equal to

$A=P(1+\frac{r}{n})^{nt}$

where

A is the Final Investment Value

P is the Principal amount of money to be invested

r is the rate of interest in decimal

t is Number of Time Periods

n is the number of times interest is compounded per year

in this problem we have

$t=5\ years\\ P=\$4,900\\ r=0.035\\n=2$

substitute in the formula above

$A=\$4,900(1+\frac{0.035}{2})^{2*5}$

$A=\$4,900(1.0175)^{10}=\$5,828.28$

5 0

3 years ago