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stiks02 [169]
3 years ago
14

Which equation could you use to solve for x in the proportion StartFraction 4 over 5 EndFraction = StartFraction 9 over x EndFra

ction?
Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
7 0

Answer:

x = 9x5 / 4

x = 45/4

(either one)

Step-by-step explanation:

\frac{4}{5} = \frac{9}{x}

Multiple known diagonals and divide by number opposite to unknown number (x).

Hope that helped!!! k

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In triangle ABC, angle A is 75o and angle B is 20o. Select the triangle that is similar to triangle ABC.
Arturiano [62]

Answer:

A. \triangleDEF where \angle D = 75^{\circ} and \angle E = 20^{\circ}.

Step-by-step explanation:

At first we must keep in mind that two triangles are similar when they have same angle configuration, that is, each pair of angles is congruent. If \triangleABC and \triangleDEF, then \angle A \equiv \angle D and \angle B \equiv \angle E. Hence, \angle D = 75^{\circ} and \angle E = 20^{\circ}.

In a nutshell, correct answer is A.

4 0
3 years ago
Point M is the midpoint of AB. If the coordinates of M are (2,8) and the coordinates of A are (10,12),what are the coordinates o
ElenaW [278]

~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ A(\stackrel{x_1}{10}~,~\stackrel{y_1}{12})\qquad B(\stackrel{x_2}{x}~,~\stackrel{y_2}{y}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left(\cfrac{ x + 10}{2}~~~ ,~~~ \cfrac{ y + 12}{2} \right)~~=~~\stackrel{M}{(2,8)}\implies \begin{cases} \cfrac{x+10}{2}=2\\[1em] x+10=4\\ \boxed{x=-6}\\[-0.5em] \hrulefill\\ \cfrac{y+12}{2}=8\\[1em] y+12=16\\ \boxed{y=4} \end{cases}

4 0
2 years ago
Number 21. Am I just dumb? I’m thinking it’s 1 or 1600, but I’m not sure lol. Please help with an explanation why!
babunello [35]

The answer is 16. 1% of 1600 is 16. 1% = 0.01. Multiply 0.01 by 1600.


7 0
3 years ago
Read 2 more answers
I just need help with D
MaRussiya [10]

Answer:

A conjecture is something that has been mathematically proved to be true, while a theorem has not been proven but is still believed to be true!

7 0
2 years ago
∆GHI is an isosceles triangle with a vertex angle H <br> If the m∠H=80°, then find the m∠I.
ehidna [41]

Given :

∆GHI is an isosceles triangle with a vertex angle H.

m∠H=80°

To Find :

The m∠I.

Solution :

Since, H is the vertex angle.

So, m∠I = m∠G = x

We know, by angle sum property of triangle :

m∠I + m∠G + m∠H = 180°

2x + 80° = 180°

x = 50°

Therefore, m∠I = 50° .

5 0
2 years ago
Read 2 more answers
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