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vovikov84 [41]
3 years ago
10

Please help real quick ​

Mathematics
2 answers:
NARA [144]3 years ago
7 0

Answer:

7 cm

Step-by-step explanation:

1 cm : 16 km   :: x cm : 112 km

Product of mean = Product of extreme

16 * x = 1 * 112

x =\frac{112}{16}

x = 7cm

malfutka [58]3 years ago
6 0

Divide total km by the km in the scale:

112 / 16 = 7

The answer is A. 7 cm

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Can you help me I dont understand ​
Tcecarenko [31]
What don’t you understand?
6 0
3 years ago
Katy invests a total of $26,500 in two accounts paying 4% and 9% annual interest, respectively. How much was invested in each ac
White raven [17]
A = amount invested at 4%.

b = amount invested at 9%.

we know the total amount invested was $26500, thus a + b = 26500.

whatever% of anything is just (whatever/100) * anything.

how much is 4% of a?  well, is just (4/100) * a, or 0.04a.

how much is 9% of b?  well, is just (9/100) * b, or 0.09b.

we know the interest yielded for both amounts adds up to $1510, thus 0.04a + 0.09b = 1510.

\bf \begin{cases}
a+b=26500\implies \boxed{b}=26500-a\\
0.04a+0.09b=1510\\
----------------\\
0.04a+0.09\left( \boxed{26500-a} \right)=1510
\end{cases}
\\\\\\
0.04-0.09a+2385=1510\implies -0.05a=-875
\\\\\\
a=\cfrac{-875}{-0.05}\implies a=17500

how much was invested at 9%?  well, b = 26500 - a.
7 0
3 years ago
M Explain why this is true<br> PLEASE HELP!!!
borishaifa [10]

Answer:

The given statement is true because the person they did their steps correctly

a) Locate a point C so that ABC is a right triangle with m ACB ∠ = ° 90 and the measure of one of the acute angles in the triangle is 45° .

b) Locate a point D so that ABD is a right triangle with m ADB ∠ = ° 90 and

the measure of one of the acute angles in the triangle is30° .

c) Locate a point E so that ABE is a right triangle with m AEB ∠ = ° 90 and

the measure of one of the acute angles in the triangle is15° .

d) Find the distance between point C and the midpoint of segment AB .

Repeat with points D and E.

e) Suppose F is a point on the graph so that ABF is a right triangle

withm AFB ∠ =° 90 . Make a conjecture about the point F.

3 0
3 years ago
Simplify the following expressions by using the order of operations
MariettaO [177]
11. 6 + 5 * 2 + (-3)
      6 + 10 - 3
      16 - 3
       13 <==

12. 67 + 84 - 12 * 4 / 16
      67 + 84 - 48/16
      67 + 84 - 3
      148 <==

13. -5 * -6 - 25/5 - 2
      30 - 5 - 2
       23 <==

14. 18 - (9 + 3) + 2^3
       18 - 12 + 8
        14 <==

15. -24 / -6 * 2
       4 * 2
       8 <==

16. 8 [ (26 + 10) - 4(3 + 2)]
      8 [ (36 - 4(5)]
      8 [ 36 - 20 ]
      8 [ 16 ]
        128 <==

17. 6 * 3 / 9 * 2 + 1
       18/9 * 2 + 1
        2 * 2 + 1
        4 + 1
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18. (9 - -4)(-8 - -7)
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       13 * -1
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5 0
3 years ago
Subtract: (x^2 - 8x + 5)-(-3x^2 + 5x-9)
Marianna [84]

Answer: 4x^2 -13x + 14

Step-by-step explanation:

(x^2 - 8x + 5)-(-3x^2 + 5x-9)

Subtract -3x^2 from x^2

(4x^2 - 8x + 5)-(5x-9)

Subtract 5x from -8x

(4x^2 -13x + 5)-(-9)

Subtract 9 from 5

4x^2 -13x + 14

7 0
3 years ago
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