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2 years ago

(7 - 3)^2 / 8 - 1 as an evaluated expression

Mathematics

2 answers:

hodyreva [135]2 years ago

7 0

Step-by-step explanation:

((7²-2×7×3+3²)/8)-1=( 16/8)-1=2-1=1

Radda [10]2 years ago

6 0

Sorry I really need it ö

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A square is divided by its four lines of symmetry. Triangles of different sizes are formed. How many total triangles are formed?

ss7ja [257]

If you're only counting the smallest triangles, then 8.

If you're counting all possible triangles including triangles made of other triangles, then 16. Each diagonal gives 2, the combined diagonals give 4, and the unit triangles give 8 for a total of 2 + 2 + 4 + 8 = 16.

4 0

2 years ago

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If every positive number has two square roots and you can find of the side of a square window by finding a square root of the ar

butalik [34]

Every positive number has two square roots - a positive and a negative (unless the value is 0).
The length of something can only be a positive number and since there is only one positive square root, there is only one answer.

5 0

3 years ago

Select the correct answer from each drop-down menu.

erik [133]

Answer:

Grades 6 and 8

Step-by-step explanation:

If the relationship of girls to boys in two different grades are proportional, they must have the same ratio. To tackle this problem, we can find the ratios of genders in each grade and compare them.

Step 1, finding ratios:

Finding ratios is just like simplifying fractions. We will reduce the numbers by their greatest common factors.

GRADE 6:

$9:12=\\3:4$

GRADE 7:

$12:18=\\2:3$

GRADE 8:

$15:20=\\3:4$

GRADE 9:

$25:36$

Can't be simplified!

Step 2:

Notice how grades 6 and 8 both had a ratio of 3:4. We can conclude that these two grades have a proportional relationship between girls and boys.

I hope this helps! Let me know if you have any questions :)

8 0

2 years ago

Find the total area surface of figure

Neporo4naja [7]

Answer:

$92 \:cm^2$

Step-by-step explanation:

$Surface\:_{area}=2\times(\ell\times w +\ell \times h + w \times h)$

$=2\times(8 \times 2 +8 \times 3 + 2 \times 3)$

$=2 \times (16+24+6)$

$=2\times 46$

$=92\: cm^2$

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2 years ago

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Let F(X) = x^2-16x+71. What is the vertex and minimum value of F(X)?

LekaFEV [45]

The veretx is normally the minimum value
hack:
for f(x)=ax²+bx+c
the x value of the vertex is -b/2a
so
f(x)=1x²-16x+71
x value is -(-16)/(2*1)=16/2=8
find f(8) to find y value of vertex

f(8)=8²-16(8)+71
f(8)=64-128+71
f(8)=7

the vertex is (8,7)
the minimum value is 7

7 0

3 years ago