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3 years ago

Solve m – 4.2 = 5.1. Show your work.

Mathematics

2 answers:

Andreas93 [3]3 years ago

6 0

Answer:

m = 9.3

Step-by-step explanation:

you want to solve for m

to get it alone you need to add 4.2 to both sides

m - 4.2 + 4.2 = 5.1 + 4.2 The 4.2 on one side cancel out solving for m

maw [93]3 years ago

4 0

Answer:

m = 9.3

Step-by-step explanation:

m- 4.2=5.1

+4.2 +4.2

m= 9.3

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Kendra bought a gallon of milk and 5/6 of a pound of oranges. If the gallon of milk cost $3.60 and she spent a total of $4.35, w

dolphi86 [110]

Answer:

A. 3.60+5/6x=4.35

Step-by-step explanation:

Total cost = milk + price per pound of oranges* number of pounds

We know the total cost = 4.35 and the cost of the milk = 3.60 and the number of pounds of oranges = 5/6

4.35 = 3.6 +5/6 * x

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4 years ago

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Translate to an algebraic expression the sum of D and F is

ivann1987 [24]

D+F=N: n is the variable (the sum).

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3 years ago

What is the value of the expression below when z=2 4z2-3z-4 please help

Phoenix [80]

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3 years ago

8. 36.8 = [11.5 – (2.5 X 3)]2

Anestetic [448]

Answer:

$[11.5-(2.5*3)]^2=16$

Step-by-step explanation:

We want to evaluate $[11.5-(2.5*3)]^2$

Let us evaluate within the parenthesis first:

$[11.5-(2.5*3)]^2=[11.5-(7.5)]^2$

$\implies [11.5-(2.5*3)]^2=[11.5-7.5]^2$

We again subtract within the bracket to obtain:

$[11.5-(2.5*3)]^2=[4]^2$

This finally gives us:

$[11.5-(2.5*3)]^2=16$

6 0

3 years ago

A student stands 20 m away from the foot

Ostrovityanka [42]

Answer:

Height of tree is $\approx$ 15 m.

Step-by-step explanation:

Given that student is 20 m away from the foot of tree.

and table is 1.5 m above the ground.

The angle of elevation is: 34°28'

Please refer to the attached image. The given situation can be mapped to a right angled triangle as shown in the image.

AB = CP = 20 m

CA = PB = 1.5 m

$\angle C$ = 34°28' = 34.46°

To find TB = ?

we can use trigonometric function tangent to find TP in right angled $\triangle TPC$

$tan \theta = \dfrac{Perpendicular}{Base}\\tan C= \dfrac{PT}{PC}\\\Rightarrow tan 34.46^\circ = \dfrac{PT}{20}\\\Rightarrow PT = 20 \times 0.686 \\\Rightarrow PT = 13.72\ m$

Now, adding PB to TP will give us the height of tree, TB

Now, height of tree TB = TP + PB

TB = 13.72 + 1.5 = 15.22 $\approx$ 15 m

7 0

4 years ago