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3 years ago

mark is 11 years older than his sister. In 8 years he will be twice as old as she will be then. How old are they now

Mathematics

1 answer:

Whitepunk [10]3 years ago

8 0

Answer: 14 years old and his sister is 3 years old

Step-by-step explanation:

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4 Dean has a rectangular picture that is 6 inches long and

vredina [299]

Answer:

Step-by-step explanation:

6/4=(6-1)/(4-x)

6/4=5/(4-x)

6(4-x)=4(5)

24-6x=20

-6x=-4

x=4/6

x=2/3

2/3 of an inch should be cut off the width.

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2 years ago

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Gradient of line AB (3,7) and (5,11)

larisa [96]

Answer:

Gradient is change in y over change in x.

gradient = y1-y2 ÷ x1-x2

=7-11 ÷ 3-5

=-4 ÷ -2

4 0

2 years ago

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What is the area of the figure? 40 ft2 84 ft2 96 ft2 can't be determined

mina [271]

Answer:

$A=80\ ft^2$

Step-by-step explanation:

we know that

The area of the figure is equal to the area of an isosceles triangle (has two equal sides) plus the area of a rectangle

step 1

Find the area of the triangle

The area of the triangle is equal to

$A=\frac{1}{2}bh$

we have

$b=16\ ft$

To find out the height of the triangle Apply the Pythagorean Theorem

$10^2=(16/2)^2+h^2$

solve for h

$100=64+h^2$

$h^2=100-64$

$h^2=36$

$h=6\ ft$

Find the area of triangle

$A=\frac{1}{2}(16)(6)$

$A=48\ ft^2$

step 2

Find the area of rectangle

The area of rectangle is equal to

$A=LW$

we have

$L=16\ ft\\W=2\ ft$

substitute

$A=(16)(2)=32\ ft^2$

step 3

Find the area of the figure

Adds the areas

$A=48+32=80\ ft^2$

5 0

3 years ago

4. Mike wants to buy a new Dodge Charger. He is able to negotiate a price of $21,500 for the color and options he wanted. He can

andrew-mc [135]

I hope this helps you understand the steps to get your answer...

8 0

2 years ago

Help, WIll give 20 points

Kisachek [45]

Answer:

i dont know

Step-by-step explanation:

6 0

2 years ago