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3 years ago

PLEASE HELP!!! I will give brainliest.

Mathematics

2 answers:

SSSSS [86.1K]3 years ago

8 0

Answer: A.) 680 square ft

Step-by-step explanation: you multiply17 and 40 and you get 680

SpyIntel [72]3 years ago

8 0

Answer:

c. 620

Step-by-step explanation:

1st: Find the area of the whole rectangle

The formula for a square is l x w

40x17=680

2nd: Find the areas of the rectangles

The are of a rectangle is the same formula for a square (l x w)

6 X 2.5=15

3rd: Multiply 15 by 4

This represents the number of smaller rectangles that are in the big rectangle

15 x 4= 60

4th: 680-60

This represents the amount of room that the students can wak on

FINAL ANSWER: 620 square feet

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(08.02)a pair of equations is shown below. 3x − y = 9 y = −2x + 11 if the two equations are graphed, at what point do the lines

mixas84 [53]

3x - y = 9
y = -2x + 11

3x - (-2x + 11) = 9
3x + 2x - 11 = 9
3x + 2x = 9 + 11
5x = 20
x = 20/5
x = 4

y = -2x + 11
y = -2(4) + 11
y = -8 + 11
y = 3

solution (where the lines intersect) is (4,3)

8 0

3 years ago

Read 2 more answers

Please help, Will give brainliest

Talja [164]

Answer:

First since 2 of the options ask for the width of BM lets solve for it using the Pythagorean theorem for both sides of point L:

a² + b² = c²

30² + b² = 50²

b² = 50² - 30²

b² = 1600

b = 40 Line BL = 40 ft

Since the ladder is 50 feet it is the same length on the other side as well

a² + b² = c²

40² + b² = 50²

b² = 50² - 40²

b² = 900

b = 30 line LM is 30 ft

SO line lm + line bl = 30 + 40 = 70 ft

A is true because ^

B isn't true because as we solved for earlier, BL is 40

C is true because line LM is in fact 30 ft as we solved for

D is not true because as we said earlier BM is 70

E is true because the same ladder was used on both sides of the street

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

Find the vertex of the graph of f(x) = x2 + 4x - 5.

Fofino [41]

You can solve this in two ways.

1. Graphical. Plot the graph for x between -5 and 1 (see attachement).
The vertex of the graph is the peak of the curve, which has the coordinates x=-2, y=-9.

2. Analytical. Calculate the derivative of the function f(x)
$\frac{df}{dx}=2x+4$
Solve the equation:
$2x+4=0$
will give the solution x=-2.
Replace x=-2 in the f(x) function and you'll get the value of y:
$(-2)^2+4 \cdot (-2)-5=4-8-5=-9$

You get the same answer: x=-2, y=-9

So the answer is
B. (-2, -9)

7 0

3 years ago

A library has five copies of a certain textbook on reserve of which two copies (1 and 2) are hardcover books and the other three

Gre4nikov [31]

Answer and Step-by-step explanation:

(a) Since the student have to stop when he gets to w softcover book, then the sample space should always stop at either 3 or 4 or 5. If the students examines the books randomly and stops at a softcover book, here are the possible ways he could carry this out,

S = {3, 4, 5, 13, 14, 15, 23, 24, 25, 123, 124, 125, 213, 214, 215}

2. Since only one book is to be examined then the student must check only one softcover book and end the examining. To do this, either he examines just 3 or 4 or 5. Therefore,

A = {3, 4, 5}

3. We need to pick the possibilities from the sample space that shows that the examining ended at book 5. Therefore,

B = {5, 15, 25, 125, 215}

4. We need to pick possibilities from the sample space that shows that book 1 was not examined. Therefore,

C = {3, 4, 5, 23, 24, 25}

5 0

2 years ago

At a certain real estate firm, realtors selling homes receive a commission of: 7% for the first $100,000 of the selling price, a

scoray [572]

Answer: The actual price of house sold at $109000.

Step-by-step explanation:

Since we have given that

Selling price = $100000

Rate of commission = 7%

So, Amount of commission would be

$\dfrac{7}{100}\times 100000\\\\\=\$7000$

Total commission = $7540

So, Remaining amount of commission would be

$\$7540-\$7000\\\\=\$540$

Rate of commission exceeding $100000 = 6%

Let the selling price of house be 'x'.

According to question,

$\dfrac{6}{100}\times x=540\\\\0.06x=540\\\\x=\dfrac{540}{0.06}\\\\x=\$9000$

Hence, the actual price of house sold at

$100000+$9000=$109000.

3 0

3 years ago