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grandymaker [24]
3 years ago
6

Kip has a collection of 68 marbles. Each glass marble has a mass of 18.5 grams. Each steel marble has a mass of 66 grams. What i

s the total mass of 48 glass marbles and 20 steel marbles in kilograms? PLS HELP!
Mathematics
2 answers:
zmey [24]3 years ago
5 0

Answer:

2.208 kg

Step-by-step explanation:

Total mass of glass marble

= 18.5×48

= 888 g

Total mass of steel marble

= 66×20

= 1320 g

Total mass of 68 marble including steel 20 and glass 48

= 888 + 1320

= 2208 g

In kilograms 2208

= 2.208 kg

Please mark as brainliest answer

wariber [46]3 years ago
3 0

Answer:

The mass of steel marble is 1320 gram and of glass marble is 888 gram.

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Directions: Use substitution to solve the systems of equations. Show your work please.
Len [333]

Hey there!

To use substitution, you substitute one of the equations into the other for one of the variables.

Since thhe first equation is already solved for y, let's substitute that one into the second equation.

Before substitution: x - y = 1

After substitution:    x - 2x = 1

See how we replaced the y with 2x? This is because the first equation is y = 2x.

Combine like terms.

-x = 1

Multiply each side by -1 so we get the value of x, not -x.

x = -1

We can now solve for y using the 1st equation, substituting the value for x into it.

Before: y = 2x

After:    y = 2(-1)

Multiply the two together.

y = -2

Let's check this in the second equation, so we know we didn't make a mistake somewhere.

Before: x - y = 1

After:   (-1) - (-2) = 1

Subtracting a negative is the same as adding a positive, so let's notate it that way to make it easier.

-1 + 2 = 1

Add.

1 = 1

Since both sides are equal, that means we've got the correct solution.

The notation for our answer will be (x, y) since it is a point on a graph.

Your final answer is (-1, -2).

Hope this helps!

7 0
3 years ago
A child is crawling at a pace of 176 inches every 3.37 min. Provided that this child is able to maintain this same pace, how man
Mice21 [21]

The child crawled 18 meters in 823 seconds.

Given:

A child is crawling at a pace of 176 inches every 3.37 minutes.

To find:

The distance covered (in meters) by a child in 823 seconds.

Solution:

Distance covered by a child in 3.37 minutes = 176 inches

Distance covered by a child in a 1 minute =   \frac{176 inches}{3.37}

1 minute = 60 seconds

Distance covered by a child in 60 seconds =  \frac{176 inches}{3.37}

Distance covered by a child in a 1 second:

=\frac{176 inches}{3.37}\times \frac{1}{60}

Distance covered by a child in 823 seconds:

=\frac{176 inches}{3.37}\times \frac{1}{60}\times 823=716.36 inches

In 1 meter there are 39.37 inches.

1 meter=39.37 inches\\1 inches=\frac{1}{39.37} meters\\716.36 inches=\frac{716.36 inches}{39.37} m=18.1956 m\approx 18 m

The child crawled 18 meters in 823 seconds.

Learn more about the unitary method here:

brainly.com/question/19359186

brainly.com/question/20065206?referrer=searchResults

6 0
3 years ago
Use the quadratic expression 25x2−y2 to answer the questions.
vova2212 [387]

Answer:

Part A)

This quadratic expression can be factored by using the difference of squares pattern.

Part B) (5x+y) and (5x-y)

Step-by-step explanation:

Given:

25x^2-y^2

above polynomial can be factorize by using difference of squares formula

a2-b2=(a+b)(a-b)

25x^2-y^2= (5x-y)(5x+y)

so for part A)

correct option is  This quadratic expression can be factored by using the difference of squares pattern.

Part B)

As factored above in part A,

the factors of given polynomial 25x^2-y^2 are (5x+y)(5x-y)

so for part B) correct options are (5x+y) and (5x-y) !

8 0
4 years ago
Can you please answer ASAP I need the answer
Alika [10]

Answer:

I think x=8

Step-by-step explanation:

5(x+7)+15=90

90 because it's a 90 degree angle

5x+35+15=90

5x+50=90

5x=40

x=8

7 0
4 years ago
Solve using long division<br> (x² – 3x - 40) + (x+5)
wolverine [178]

The chosen topic is not meant for use with this type of problem.

However, if you simplify it, your answer is:

x^2 − 2x − 35

4 0
3 years ago
Read 2 more answers
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