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krek1111 [17]
3 years ago
9

3 times the sum of a number and 3

Mathematics
1 answer:
zimovet [89]3 years ago
8 0

Answer:

3(x +3)

Step-by-step explanation:

Let x  be the unknown number

We need to find the sum first

x+3

Then multiply 3 by the sum

3(x +3)

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Latrice is given an unknown substance and is asked to identify is based on his properties. She measures its mass as 239.6grams.
Iteru [2.4K]

Answer:

density =8.87g/cm³

From chart the density shows that it is a Colsibro copper alloy, a precipitation hardening copper nickel silicon.

Step-by-step explanation:

This problem bothers on the density of substances

Given data

Mass m of substance = 239.6grams

length l=3cm

width b=3cm

height h=3cm

Volume of substance =l*b*h

=3*3*3=27cm³

We know that the density of the substance ρ=mass/volume

ρ= 239.6/27= 8.87g/cm³

8 0
3 years ago
You are playing darts with your friends. You get 10 points for bullseye-yellow, 5 for red, 3 for purple, and one for black. You
Gnom [1K]

Answer:

10 and 10

10 and 5

10 and 3

5 and 3

3 and 5

Step-by-step explanation:

6 0
3 years ago
Question 2 The length of a rectangle is 5 yd more than twice the width, and the area of the rectangle is 63 yd2 . Find the dimen
Sedaia [141]
<span>L = 2W + 5
A = LW = 63
L = 63/W
W=63/L

L = 2W + 5
63/W = 2W + 5
63 = 2WW + 5W
2WW + 5W - 63 = 0

2WW + 5W - 63 = 0 
is already in quadratic equation form: ax^2 + bx + c = 0

use the quadratic formula to solve for two solutions:
x = ( -b +- sqrt( bb - 4ac ) ) / 2a

the two solutions are:
x = 9/2
x = -7
you cant have a negative solution for length so use the positive one

solve for length:
L=5+2(9/2)
L=5+18/2
L=5+9
L=14


W = 9/2
L = 14</span>
3 0
3 years ago
How do i solve 6y-5=-3(2y+1)
ziro4ka [17]
<span>6y-5=-3(2y+1)
6y - 5 = -6y - 3
12y = -3 + 5
12y = 2
    y = 2/12
    y = 1/6</span>
3 0
3 years ago
Mary can make 20 ice cream pies in 3 hours select the ways to write a ratio
coldgirl [10]

Answer:

20/3= or 3/20=

Step-by-step explanation:

plz mark brainlest

3 0
3 years ago
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