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Damm [24]
3 years ago
11

-√23 rational or irrational ? 17/18 rational or irrational ? -√81 rational or irrational ?

Mathematics
1 answer:
monitta3 years ago
4 0

-√23 rational or irrational ? Irrational

17/18 rational or irrational ? Rational

-√81 rational or irrational ? Rational

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Suppose a lab need to need to make 400 liters of 39% acid solution, but the only solutions available to the lab are 20% acid and
Maslowich

Answer:

c + d = 400

0.2c + 0.5d = 156

Step-by-step explanation:

Let

c = number of liters of 20% acid solution

d = number of liters of 50% acid solution.

c + d = 400 (1)

0.2c + 0.5d = 400(0.39)

0.2c + 0.5d = 156 (2)

From (1)

c = 400 - d

Substitute c = 400 - d into (2)

0.2c + 0.5d = 156 (2)

0.2(400 - d) + 0.5d = 156

80 - 0.2d + 0.5d = 156

- 0.2d + 0.5d = 156 - 80

0.3d = 76

d = 76/0.3

d = 253.33 liters

Substitute d = 253.33 into (1)

c + d = 400

c + 253.33 = 400

c = 400 - 253.33

c = 146.67 liters

6 0
3 years ago
Find the volume of the cylinder.<br> Either enter an exact answer in terms of it or use 3.14 for T.
kaheart [24]

Answer:

188 units cubed

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Which of the following expressions is equivalent to 15x+y−x−10y?
lions [1.4K]
14x-9y is the answer
6 0
2 years ago
Nathan invested $3,500 in an account paying an interest rate of 3.5% compounded
Gnom [1K]

Answer:

\text{Compounded Quarterly:}

Compounded Quarterly:

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

A=P(1+  

n

r

​  

)  

nt

 

Compound interest formula

P=3500\hspace{35px}r=0.035\hspace{35px}t=19\hspace{35px}n=4

P=3500r=0.035t=19n=4

Given values

A=3500\left(1+\frac{0.035}{4}\right)^{4(19)}

A=3500(1+  

4

0.035

​  

)  

4(19)

 

Plug in values

A=3500(1.00875)^{76}

A=3500(1.00875)  

76

 

Simplify

A=6786.05963486

A=6786.05963486

Use calculator

A\approx 6800

<h2>A≈6800</h2>

Step-by-step explanation:

3 0
4 years ago
If the ordered pair (-5/2,y) lies on the graph of y=7-2x, find the value of y
zavuch27 [327]
<span>y=7-2x
</span><span>y = -2x + 7 so now we have slope m = -2, b = 7

pass point </span><span>(-5/2,y) then
y = mx + b
y =-2(-5/2) + 7
y = 5  + 7
y = 12

answer : </span><span>ordered pair (-5/2,12)</span>
5 0
4 years ago
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