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3 years ago

2r^2+3s^3-r^2+4t^2-r^2 if r=-2, s=-3, and t=5

Mathematics

1 answer:

dimulka [17.4K]3 years ago

3 0

$2(-2)^2+3(-3)^3-(-2)^2+4(5)^2-(-2)^2 = 19$

19 is the answer.

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The weight of a box varies directly as the volume of the box. If a 138-pound box has a volume of 23 gallons, what is the weight

kolezko [41]

Answer:

D. 150 pounds

Step-by-step explanation:

For be directly proportional, it has to be that as one value increases the other does it equally, so

If 138 pound box has a volume of 23 gallons for 25 gallons ?. For being directly proportional tha value must be higest

138 → 23 $x=\frac{25*138}{23} = 150$

x → 25

5 0

2 years ago

Can someone do this for me or help me

Elden [556K]

JM=12
JL= 14
MN=?
MK=?

VT= 11
UV= 9
RS=?
ST=?

GF=23
HF=20
GH=?
GE=?

M<1=?
M<2=?
M<3=?
M<4=?
M<5=?
M<6=?
M<7=?
M<8 = 90 degrees

WXZ = 34 degrees
WVZ=90 degrees
ZYW= 56 degrees

These are the only answers I knew, I’m sorry I couldn’t find the rest. If I do find more answers, I’ll comment them.

5 0

2 years ago

How can the order of operations be used to simplify expressions? Create your own unique example showing order of operations.

Lostsunrise [7]

10(13+12)=x thats a good one

4 0

3 years ago

Solving Exponential and Logarithmic Equations In Exercise, solve for x. 500(1.075)120x = 100.000

Volgvan

Answer:

The solution is:

$x = 0.61$

Step-by-step explanation:

The first step to solve this equation is placing everything with the exponential to one side of the equality, and everything without the exponential to the other side. So

$500(1.075)^{120x} = 100000$

$(1.075)^{120x} = \frac{100000}{500}$

$(1.075)^{120x} = 200$

To find x, we have to apply log to both sides of the equality.

We also have that:

$\log{a^{x}} = x\log{a}$

$\log{(1.075)^{120x}} = \log{200}$

$120x\log{1.075} = 2.30$

$120x*0.03 = 2.30$

$3.77x = 2.30$

$x = \frac{2.30}{3.77}$

$x = 0.61$

4 0

3 years ago

Kirstin knows that the initial fee for adopting a dog from the animal shelter is $75. This fee needs to be considered when calcu

irina [24]

Answer:

The function is represented by $C(d) = 75\,USD + r\cdot d$ .

Step-by-step explanation:

In this case, we must observe that total cost of the dog ( $C(d)$ ) is the sum of two components: i) Fixed cost ( $C_{f}$ ) - Adoption fee, ii) Variable cost ( $C_{v}$ ) - Daily cost of feeding the dog, both measured in US dollars.