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3 years ago

80 timess 40 plus 60

Mathematics

2 answers:

jeka57 [31]3 years ago

3 0

Answer:

3260 hope i helped u

Step-by-step explanation:

Anika [276]3 years ago

3 0

80 times 40 is 320 then plus 60 equals 380 have a good rest of your day/night

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Elizabeth wants to change cell phone plans. Before contacting the service provider, she makes a table of her cell phone minutes

ad-work [718]

Answer:

43 minutes
$47

Step-by-step explanation:

1. Cell phone usage

Mon to Sun = 38, 62, 40, 10, 30, 55, 65

Mean = (38+62+40+10+30+ 55 + 65)/7 = 43 minutes rounded

2. Water bills

Jan to Dec = $40 $42 $40 $38 $48 $50 $58 $62 $56 $46 $44 $44

Mean = (40+42+40+38+48+50+58+62+56+46+44+44)/12 = $47 rounded

8 0

4 years ago

Explanations not just answers: Sarah measures the angle of elevation to the top of a tree as 23.6 degrees from the point which i

Reika [66]

See the attached diagram.

In the right triangle, x is opposite the 23.6 degree angle, and the adjacent side is 250 m. This suggests using the tangent ratio.

$\frac{x}{250}=\tan 23.6 ^\circ \\ x=250 \cdot \tan 23.6^\circ \approx 109.2$

Finally, to get the height of the tree, add Sarah's height, 1.5 m.

The tree is approximately 110.7m tall.

6 0

4 years ago

Simplify -3xy 3 + 7xy 3 + (-xy 3) + (-3xy 3).

Gnom [1K]

I thing the answer is 75 I may be wrong but that’s what I got

6 0

4 years ago

Read 2 more answers

Katie Cole purchased a mountain bike with an installment loan that has an APR of 14%. The mountain bike sells for $762. The stor

Brums [2.3K]

Answer-

Finance charge is $99

Solution-

Price of mountain bike = $762

The store's financing requires a 15% down payment, so the present value of annuity will be,

$762-(762\times \frac{15}{100})=\$647.7$

We know that,

$\text{PV of annuity}=P[\frac{1-(1+r)^{-n}}{r}]$

$PV\ of\ annuity=647.7,\\\\P=?,\\\\r = 14\%\ annually=\frac{14}{12}\%\ monthly=\frac{14}{1200}\ monthly\\\\n=24\ months$

Putting the values,

$\Rightarrow 647.7=P[\dfrac{1-(1+\frac{14}{1200})^{-24}}{\frac{14}{1200}}]$

$\Rightarrow P=\dfrac{647.7}{\frac{1-(1+\frac{14}{1200})^{-24}}{\frac{14}{1200}}}$

$\Rightarrow P=\dfrac{647.7}{20.8277}$

$\Rightarrow P=\$31.10$

With a monthly payment of this, he will be paying in 24 months will be,

$=31.10\times 24=\$746.4$

Then,

$\Rightarrow \text{Total payment}=\text{Down payment+Monthly payment}=(762\times \frac{15}{100})+(746.4)=\$861$

The extra amount he will be paying,

$=861-762=\$99$

6 0

4 years ago

What’s the vertex of the quadratic function f(x)=(x-8)(x-2)

Elanso [62]

To find the vertex we need to represent quadratic function in vertex form.
f(x)=(x-8)(x-2)
f(x)=x²-8x-2x+16=x²-10x+16
f(x)= x²-2*5x+25-25+16= (x-5)² - 9

f(x)= (x-5)² - 9

Vertex is going to be (5, - 9)

6 0

4 years ago