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Volgvan
3 years ago
15

James took two math tests. he scored 86 points on the second test. this was 18 points higher than his score on the first test. w

rite and solve an equation to find the score james received on the first test. show that your answer is reasonable
Mathematics
1 answer:
Elena-2011 [213]3 years ago
6 0
A simple equation you could use to find the score James got on his first test would be x+18=86 where x is the score he received on the first test.

<u>Solution</u><u />
x+18=86
   -18-18
x=68

With this in mind, using the equation we created, we know that James received 68 points on his first test.
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A rectangular piece of metal is 15 in longer than it is wide. Squares with sides 3 in long are cut from the four corners and the
ziro4ka [17]

Answer:

The original dimensions of the piece of metal are

Length: 36 inches

Width: 21 inches

Step-by-step explanation:

Let

x ----> the original length pf the piece of metal

y ----> the original width pf the piece of metal

we know that

x=y+15 ----> equation A

The volume of the box is equal to

V=LWH

we have

V=1,350\ in^3

L=(x-3-3)=(x-6)\ in\\W=(y-3-3)=(y-6)\ in

H=3\ in

substitute in the formula of volume

1,350=(x-6)(y-6)(3) ----> equation B

substitute equation A in equation B

1,350=(y+15-6)(y-6)(3)

solve for y

450=(y+9)(y-6)

y^2-6y+9y-54=450\\y^2+3y-504=0

Solve the quadratic equation by graphing

using a graphing tool

The solution is y=21

Find the value of x

x=21+15=36

therefore

The original dimensions of the piece of metal are

Length: 36 inches

Width: 21 inches

5 0
3 years ago
1. Michael DeBakey is an important Texan. What is his contribution and what did he do that was important? Did he invent anything
Jobisdone [24]

Answer:

n 1932 DeBakey devised the “roller pump,” an essential component of the heart-lung machine that permitted open-heart surgery. He also developed an efficient method of correcting aortic aneurysms by grafting frozen blood vessels to replace diseased vessels.

Works written: The New Living Heart

Born: September 7, 1908, Lake Charles

Died: July 11, 2008

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
HELP PLZ!!!! How did you do 2a-5b? And what are the answers
Xelga [282]

both of the questions?

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3 years ago
Keep answer in fraction form. Use &lt; &amp;&gt; in your solution set. Solve for b.Give an exact answer in simplified form. 30b
Fed [463]
I do not know the answer but i need to answer a question in order to ask one,sorry,hope u understand:/
7 0
3 years ago
(Score for Question 1: _____ of 5 points)
slava [35]

Answer:

x = 13.8

Step-by-step explanation:

Given

See attachment for triangle

Required

Find x

To find y, we make use of the relationship between sides lengths 11 & x and angle 37

The relationship is:

cos(37) = \frac{11}{x}

i.e.

cos(\theta) = \frac{Adjacent}{Hypotenuse}

Make x the subject

x = \frac{11}{cos(37)}

x = \frac{11}{0.7986}

x = 13.7741

x = 13.8 -- approximated

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3 years ago
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