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Rainbow [258]
3 years ago
5

Explain how to simplify this expression: 4a + 19 - 3a - 7

Mathematics
1 answer:
Marina86 [1]3 years ago
8 0
Answer = a + 12

You take away 3a from 4a (which leaves a) and then take 7 away from 19 (which leaves 12)
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In a figure, m<1=m<2. Which property can be used to reason that m<2=m<1.
Aneli [31]

Answer: Symmetric property of equality

This is the idea that if x = y, then y = x. We can swap the left and right sides of an equation, and still mean the same thing. The same applies to congruences as well.

5 0
3 years ago
Two angles of traingle is 40° and 60° . find the measurement of the third angle​
allochka39001 [22]

Answer:

80 degrees

Step-by-step explanation:

the angles in a triangle all add up to 180 degrees

7 0
3 years ago
Graph the function y=x^2-4
7nadin3 [17]
Pick x values and plot your parabola
5 0
4 years ago
A rectangular storage container with an open top is to have a volume of 10 m3. The length of this base is twice the width. Mater
marshall27 [118]

Answer:

$ 327.08

Step-by-step explanation:

Let x = width of the container,

Then Length of the container = 2x

Let h = height of the container,

volume of the container can be calculated as length × width × height

= 2x × x × h

= 2x² h

Then we can say Volume =

= 2x² h=10

If we simplify inorder to get h

We have h= 5/x²

Then the area= (2L×h) +(2xh)

Where L is lenght

x= wish

h= height

= 2× 2x × h+ x× h

= 4x× 5/x + 2x × 5/x

Area = 30/x

Now, the area of the base = length × width

But from question, for the base costs $20 per square meter. Material for the sides costs $12 per square meter

Then the cost C(x)= 2x²× 20+30/x ×12

C(x)= 40x²+35/x²

If we differenciate wrt x we have

C(x)= 80-360/x²

If we equate C(x)=0the

80=360/x²

x= 1.651

If substitute to C(x)= 40x²+35/x²

C(x) = 40(1.651)² + 35/(1.651)²

We have cost= 327.08

6 0
3 years ago
Find the circumference of a roll of tape whose diameter is 5 cm.
elena55 [62]

Answer:

15.7 cm

Step-by-step explanation:

Circumference= Diameter * Pi

Hence,

Circumference of the circle= 3.14 * 5

=15.7 cm

7 0
3 years ago
Read 2 more answers
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