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4 years ago

Number 24 I am stuck. Please help

Mathematics

1 answer:

ehidna [41]4 years ago

6 0

Answer:

alr

Step-by-step explanation:

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Find the length of the indicated side. 10.4 cm 9.5 cm 11.7 cm 8 cm

andrew-mc [135]

Answer:

9.5 cm

Step-by-step explanation:

on the bottom with 18, divide that like 3 12 3 (which is 18) and it will make a square in the middle.

10^2 = x^2+3^2

100= x^2+9

x^2=91

square root 91

=9.5 cm

8 0

2 years ago

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Using Cramer’s Rule, what is the value of y in the system of linear equations below?

Vadim26 [7]

for the system of equations

$a_1x+b_1y=c_1 \\a_2x+b_2y=c_2$

the three matrices needed to use Cramer's Rule are:

$D=\left[\begin{array}{cc}a_1&b_1\\a_2&b_2\end{array}\right] \\\\D_x=\left[\begin{array}{cc}c_1&b_1\\c_2&b_2\end{array}\right] \\\\D_y=\left[\begin{array}{cc}a_1&c_1\\a_2&c_2\end{array}\right]$ .

To use Cramer's Rule we have to calculate the three determinants listed below of the matrices listed below.

$D=\left[\begin{array}{cc}2&5\\-3&-2\end{array}\right] \\\\D_x=\left[\begin{array}{cc}-13&5\\3&-2\end{array}\right] \\\\D_y=\left[\begin{array}{cc}2&-13\\-3&3\end{array}\right]$ .

The value of the determinants are shown below.

$det(D)=(2)(-2)-(-3)(5)=-4+15=11\\det(D_x)=(-13)(-2)-(3)(5)=26-15=11\\det(D_y)=(2)(3)-(-3)(-13)=6-39=-33\\$

The value of y is $\frac{det(D_y)}{det(D)}=-\frac{33}{11} =-3.$ .

3 0

4 years ago

Determine how many, what type, and find the roots for f(x) = x4 + 21x2 − 100. Determine how many, what type, and find the roots

kykrilka [37]

Answer:

Please, see the attached files.

Step-by-step explanation:

Please, see the attached files.

8 0

3 years ago

Work out the total surface area of the hemisphere which has a radius of 10cm

Naddik [55]

Answer:

942 square cm

Step-by-step explanation:

$Total \: surface \: area \: of \: hemisphere \\ = 3\pi {r}^{2} \\ = 3 \times 3.14 \times {10}^{2} \\ = 9.42 \times 100 \\ = 942 \: {cm}^{2}$

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3 years ago

guy wire attached to a telephone pole makes a 67-degree angle with the ground. at a point 20ft farther out from the guy wire the

qaws [65]

It is best to draw the situation given above to understand the problem better. You will see that there are two right triangles that can be made. One would have the angle 67 degrees and the other with angle 35 degrees. We calculation as follows:

From the triangles, we can set up two equations with two unknowns:
tan 67 = h/x
tan 35 = h/(20+x)

h = 19.93 ft

4 0

4 years ago

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