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2 years ago

Use the linear combination method to solve the system of equations.

Mathematics

2 answers:

laiz [17]2 years ago

6 0

Answer:

Figures

figure 2.1

Figure 2.1

figure 2.10

Figure 2.10

figure 2.12

Figure 2.12

figure 2.13

Figure 2.13

Step-by-step explanation:

guapka [62]2 years ago

6 0

Y=-3.34 x=-8.89

Combine two equations

0x-1.5y=5.01

-1.5y/-1.5=5.01/-1.5

y=-3.34

Plug in the y value for in one of the equations to solve for x.

-2.1x + 4(-3.34) = 5.3

-2.1x -13.36= 5.3

-2.1x = 18.66

-2.1x/-2.1 = 18.66/-2.1

x=-8.89

Plug in both values to validate the answer. Keep in mind there was rounding so the equation will not 100% be correct.

2.1(-8.89) - 5.5(-3.34) =

-18.66 + 18.37 = -0.29

-2.1(-8.89) + 4(-3.34) = 5.309

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An army base in the desert is located at the origin, O of an x-y coordinate system. A soldier at point P needs to determine his

Nutka1998 [239]

Answer/step-by-step explanation

The soldier at point P lie on a parabola because he determined his position and distances from towns A and B through measurement of the difference in timing (phase) of radio signals received from the two towns.

This analysis of the signal time difference gives the difference in distance of the soldier at P, from the towns.

This process is known as hyperbolic navigation.

These distances of point P from towns A and B is estimated by the soldier at point P, by measuring the delay localizes the receiver to a hyperbolic line on a chart.

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Point P will be at the intersection of the lines.

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8 0

3 years ago

I need help with geometry

satela [25.4K]

Answer:

45 is the answer

Step-by-step explanation:

first you have to know the sum of interior angle of that pentagon (540)

then add the all angle.

148 + x + 112 + 90 + 3x + 10 = 540.

or, 360 + 4x = 540

or, 4x = 540 - 360

or, 4x = 180

or, x = 180/4

or, x = 45

hope it will help you☺✌

6 0

2 years ago

Read 2 more answers

a researcher at a major clinic wishes to estimate the proportion of the adult population of the united states that has sleep dep

Anna11 [10]

Answer:

The estimate of a population proportion is approximately 541.

Step-by-step explanation:

We can solve the the problem by using the formula for minimum sample needed for interval estimate of a population proportion which is given by the formula

n = pq ((Z/2) / E)^2

As, p is not defined so we use the standard p and q which is 0.5 and 0.5.

The reason for this is we have to choose form 0.1 to 0.9 both values of p and q, we will find the maximum value of pq occurs when they both are 0.5.

Next, we will find the value of (Z/2) by looking at the Z-table, we will find that at 98% confidence (Z/2) = 2.326. Now we start substituting the values in the above formula

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n ≅ 541.

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3 years ago

When asked to graph the line for y = 2/5x + 3, Mallory drew the line shown.

Helen [10]

Answer:

Step-by-step explanation:

Using desmos we can see that the slope is positive and increasing while Mallory made a negative slope.

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3 years ago

Which of the following is a solution to 2cos^2x– 2 = 0 ?

Sphinxa [80]

Answer:

A and C

Step-by-step explanation:

Given

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cos x = - 1 ⇒ x = $cos^{-1}$ (- 1) = 180°

8 0

3 years ago

Read 2 more answers