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valina [46]
3 years ago
7

Which nuWhich expressions result in a product that has a best estimate of 80? Select all that apply.

Mathematics
1 answer:
VMariaS [17]3 years ago
7 0

Answer:

E; 8x9 is equal to 72 which estimated is 70

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Traveling with a speed of 70 mph, a car covered a distance D miles in T hours. Write an equation that relates the distance D thi
irina [24]

Answer:

Part A) D=70T

Part B) D=105\ miles

Step-by-step explanation:

Par A) Write an equation that relates the distance D this car travels in T hours

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form y/x=k or y=kx

The speed is a proportional relationship between the distance and the time

Let

D ----> the distance in miles

T ----> the time in hours

so

D=kT

In this problem the constant of proportionality k represent the speed of the car in miles per hour

we have

k=70\ mi/h

substitute

D=70T

Part B) Use the equation to find the distance the car travels between 3:30 p.m. and 5:00 p.m

we know that

The time between 3:30 p.m. and 5:00 p.m is equal to

5:00 p.m-3:30 p.m=1.5 hours

so

For T=1.5 h

substitute in the equation and solve for D

D=70(1.5)

D=105\ miles

7 0
3 years ago
A man was murdered in his office. The suspects are gerry, julie, jason, nick and sophie. The number 6,4,9,10, 11 are written on
lara31 [8.8K]
A man was murdered in his office. The suspects are gerry, julie, jason, nick and sophie. The number 6,4,9,10, 11 are written on calendar with blood. The correct answer is JASON.

<span>In calendar, </span>
6 - June
4 - April
9 - September
10 - October
11 - November

<span>When you add all the initials, you'll get JASON.</span>
5 0
3 years ago
A fish tank is three-fourths full.
max2010maxim [7]

Answer: \frac{5}{12}

Step-by-step explanation:

   We will subtract the amount of water that leaked out from the amount of water originally in the fish tank.

\displaystyle \frac{3}{4} - \frac{1}{3} =\frac{3*3}{4*3} -\frac{1*4}{3*4} =\frac{9}{12} -\frac{4}{12}=\frac{5}{12}

         The fish tank is \frac{5}{12} of the way full.

6 0
2 years ago
How can I solve the statement below?
QveST [7]

9514 1404 393

Answer:

  A ≈ 65.4°

Step-by-step explanation:

The mnemonic SOH CAH TOA is intended to remind you of the trig relations associated with pairs of sides. For angle A, given sides b and c are the adjacent side and the hypotenuse, respectively. The appropriate relation is ...

  Cos = Adjacent/Hypotenuse

  cos(A) = b/c

  A = arccos(b/c) = arccos(2.5/6)

  A ≈ 65.4°

6 0
3 years ago
Find the scale factor,and find the unknown side lengths.<br> Help if you can please
Burka [1]

Step-by-step explanation:

Solution,

since two of these triangle are similar so,

i) LK/LJ=MN/NO

or,j/8=18/12

or,j=18×8/12

.°. j = 12m

ii)JK/JL=MO/NO

or,10/8=n/12

or,120/8=n

.°.n=15m

5 0
3 years ago
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