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3 years ago

For brainiest:):):):):)

Mathematics

1 answer:

Nataliya [291]3 years ago

3 0

Answer:

1. 0.39

2. 0.126

3. 5%

4. 125%

hope this helped!

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In ΔDEF,{EF}\cong{DE} EF ≅ DE and m∠E = 104°. Find m∠D.

Alexeev081 [22]

The 3 inside angles need to equal 180.

Subtract E from 180 to find the sum of the other two angles:

180 - 104 = 76

Now because EF ≅ DE , angle D and F would be the same so divide 76 by 2

Angle D = 38

7 0

3 years ago

A collection of nickels and dimes is worth $9.45. If the number of dimes is doubled, the value is

eduard

Answer:

The number of nickels is 45 and the number of dimes is 72.

Step-by-step explanation:

Let

x ----> number of nickels

y ----> number of dimes

Remember that

$1\ nickel=\$0.05$

$1\ dime=\$0.10$

$0.05x+0.10y=9.45$ ------> equation A

$0.05x+0.10(2y)=16.65$

$0.05x+0.20y=16.65$ ------> equation B

Solve the system by substitution

we have

$0.05x+0.10y=9.45$ ------> equation A

$0.05x+0.20y=16.65$ ------> equation B

Multiply both equations by 100 both sides

$5x+10y=945$ ----> $5x=945-10y$ --> equation C

$5x+20y=1,665$ ----> equation D

substitute equation C in equation D

$(945-10y)+20y=1,665$

solve for y

$945+10y=1,665$

$10y=1,665-945$

$10y=720$

$y=72\ dimes$

Find the value of x

$5x=945-10y$

$5x=945-10(72)$

$5x=225$

$x=45\ nickels$

Alternative Method

Solve the system by graphing

Remember that the solution is the intersection point both graphs

using a graphing tool

the solution is the point (45,72)

therefore

The number of nickels is 45 and the number of dimes is 72.

7 0

3 years ago

Here is a diagram and its corresponding equation. Find the solution to the equation and explain your reasoning. (Please help ASA

jeka94

Use order of operations for this

4x+17=23

Move the 17 to the 23

4x=23-17

Then move the 4 over leaving the x by itself

X=6/4

X=1.5

3 0

3 years ago

Read 2 more answers

Plss help for brainlist

Elden [556K]

Answer:

option A is correct !

hope this answer helps you dear...take care!

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3 years ago

Ms. Gadget car broke down on the turnpike. Acme town Ig charged $30 plus $3 per mile to tow the car. If ms. Gadget paid $162, ho

Reil [10]

The equation would be 30+3m=162 then you solve the problem

4 0

2 years ago