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3 years ago

Draw quick pictures. write how many hundreds, tens, and ones in all. Write the number. add 231 and 218

Mathematics

2 answers:

juin [17]3 years ago

6 0

2hundreds 3 tens 1 ones 2 hundreds 1 tens 8 ones

Maurinko [17]3 years ago

5 0

There are 4 hundreds 4 tens and 9 ones.

Work: 231 + 218 = 439

Hope this helps!

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Need quickly please help!

yaroslaw [1]

<h3>Answer: D) 5</h3>

=======================================================

Work Shown:

We use the intersecting chords theorem

(AH)*(HG) = (FH)*(HB)

(x-2)*(x+7) = (2x-1)*(4)

x*(x+7) - 2(x+7) = 4(2x-1)

x^2+7x - 2x - 14 = 8x - 4

x^2 + 7x - 2x - 14 - 8x + 4 = 0

x^2 - 3x - 10 = 0

(x - 5)(x + 2) = 0

x-5 = 0 or x+2 = 0

x = 5 or x = -2

If x = -2, then AH = x-2 = -2-2 = -4, but having a negative segment length is not possible. Lengths must be positive. So we ignore x = -2

If x = 5, then we find the following lengths

AH = x-2 = 5-2 = 3
HG = x+7 = 5+7 = 12
FH = 2x-1 = 2*5-1 = 9

Then note how AH*HG = 3*12 = 36 while FH*HB = 9*4 = 36. This confirms that (AH)*(HG) = (FH)*(HB) is a true equation and confirms we have the correct x value.

7 0

3 years ago

Solve for X:

saveliy_v [14]

$- \frac{6}{5} x - 4 = - 46 \\ - \frac{6}{5} x = - 42 \\ - 6x = - 210 \\ x = 35$
Translate the words into math and solve for x. Any questions let me know.

3 0

3 years ago

In the diagram below, XY and YX are tangent to o . what is the measure of XYZ ?

Agata [3.3K]

Answer:

B. 51°

Step-by-step explanation:

m<XYZ = 1/2(231 - 129)

m<XYZ = 102/2

m<Y = 51

Answer

B. 51°

3 0

4 years ago

the pitch, or frequency, of a vibrating string varies directly with the square root of the tension. if a string vibrates at a fr

Naily [24]

$\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\
\begin{array}{llll}
\stackrel{frequency}{f}\textit{ of a vibrating string varies directly}\\
\qquad \qquad \textit{with the square root of the tension }\stackrel{tension}{t}
\end{array}$

$\bf f=k\sqrt{t}\quad \textit{we also know that }
\begin{cases}
f=300\\
t=8
\end{cases}\implies 300=k\sqrt{8}
\\\\\\
\cfrac{300}{\sqrt{8}}=k\implies \cfrac{300}{\sqrt{2^2\cdot 2}}=k\implies \cfrac{300}{2\sqrt{2}}=k\implies \cfrac{150}{\sqrt{2}}=k
\\\\\\
\textit{and we can \underline{rationalize} it to }\cfrac{150\sqrt{2}}{2}\implies 75\sqrt{2}=k$

$\bf thus\qquad f=\stackrel{k}{75\sqrt{2}}\sqrt{t}\implies \boxed{f=75\sqrt{2t}}\\\\
-------------------------------\\\\
\textit{now, when t = 72, what is \underline{f}?}\qquad f=75\sqrt{2(72)}$

5 0

4 years ago

Read 2 more answers

What is the slope of the line that passes through (5,7) and (-10,-5)

Nat2105 [25]

Answer:

4/5

Step-by-step explanation:

formula for slope is (y2-y1)/(x2-x1)

3 0

3 years ago