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valkas [14]
3 years ago
12

Unit 3 Exam

Mathematics
1 answer:
ohaa [14]3 years ago
5 0

Answer:

b=√119

Step-by-step explanation:

a2+b2=c2

(5×5)+(b2) =(12×12)

25+b2=144

b2=144-25

b2= 119

b=√119

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PLEASE HELP! Choose the expression that is NOT equivalent to the following expression:
bija089 [108]

Answer:

D. 4(11y + 22)

Step-by-step explanation:

4 times 11 is not 45 so D is the answer

3 0
3 years ago
How much metal did they use to cover the ramp, including the bottom?
Ad libitum [116K]
<h3>Answer:  1.79 square meters</h3>

Work Shown:

A = area of the triangular front face

A = base*height/2

A = 0.8*0.1/2

A = 0.04

L = lateral surface area

L = combined area of all the rectangular faces

L = (perimeter of the triangular face)*(depth of the prism)

L = (0.1+0.8+0.81)*(1)

L = 1.71

SA = total surface area of the triangular prism

SA = 2*A+L

SA = 2*0.04+1.71

SA = 1.79 square meters

6 0
2 years ago
Read 2 more answers
a rectangle has an area of 30 square meter and a perimeter of 34 meters. what are the dimensions of rectangle?
kow [346]
A=lw
P=2l+2w

30=lw
34=2l+2w

30=lw --> w= \frac{30}{l}

34=2l+2( \frac{30}{l}) \\ 34=2l+ \frac{60}{l}  \\ 34l=2l^2+60 \\ 2l^2-34l+60=0 \\ 2(l-2)(l-15)=0 \\ l=2, 15

30=(2)w
15=w

30=(15)w
2=w

The dimensions can either be 15 x 2 or 2 x 15.
3 0
4 years ago
There is a ratio of five girls to 3 boys there are 24 boys how many girls are thier
Olegator [25]
There are 40 girls. The answer is 40. 
7 0
3 years ago
Read 2 more answers
7.EE.1.1
victus00 [196]

Answer:

-0.55n - 0.05

Step-by-step explanation:

You can start by distributing:

(0.25n - 0.3) - (0.8n - 0.25)

0.25n - 0.3 - 0.8n + 0.25

Then, you can combine like terms(0.25n & -0.8n; -0.3 & 0.25)

-0.55n - 0.05

4 0
3 years ago
Read 2 more answers
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