3 years ago

Someone answer this please

Mathematics

1 answer:

Art [367]3 years ago

3 0

Answer:

7.5

Step-by-step explanation:

The decimal form would be 7.549... when put in a calculator. When rounded, it will be 7.5

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What is the solution set for this inequality?

Ostrovityanka [42]

Answer:

X<-4

Step-by-step explanation:

-3x+10>22

subtract 10 to both sides

-3x>12

divide by -3 on both sides

when you divide by a negative number you flip the sign so the answer will be x<-4

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3 years ago

At 5 feet tall, Emily casts a shadow that is 8 feet long. She is standing near a tree that casts a shadow that is 28 feet long.

Thepotemich [5.8K]

Answer:

The tree is 17.5 ft tall

Step-by-step explanation:

We can use proportions to solve this.

Notice that Emily (5 feet tall) and her shadow (8 feet long) constitute the two legs of a right angle triangle (see attached image).

The nearby tree (unknown height H), will also cast a shadow (28 ft long) with the same inclination as Emily does due to the unique position of the sun relative to them.

Then we can use the proportion associated with the sides of similar triangles:

$\frac{5\,ft}{8\,ft} =\frac{H}{28\,ft}$

Then, we can solve for H in the equation:

$\frac{5\,ft}{8\,ft} =\frac{H}{28\,ft} \\H=\frac{28*5}{8} \,ft\\H=17.5 \.ft$

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3 years ago

jamie has $37 in his bank account on sunday. the table shows his account activity for the next four days. what was the balance i

alexgriva [62]

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Each of the faces (sides) has an area 66 square millimeters. Find the total surface area of the triangular pyramid.

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so total surface area = 4 x area of each face = 4 x 66
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