3 years ago

Math exercise math test

Mathematics

2 answers:

bezimeni [28]3 years ago

7 0

Your answer is coreeect good job

ddd [48]3 years ago

5 0

Answer:

The correct answer is correct

Step-by-step explanation:

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Suppose you have $5000 to invest. A certificate of deposit (CD) earn 6% annual interest, while bonds, which are riskier, earn 8%

Travka [436]

$2000(1.06)+3000(1.08)-5000=360$
$2000(1.06)^2+3000(1.08)^2-5000=746.4$

6 0

4 years ago

A line that passes through the point (x,y), with a y-intercept of b and a slope of m, can be represented by the equation y = mx

tester [92]

Answer:

b=-18

Step-by-step explanation:

If a line that passes through the point $P(x_o,y_o)$ and it has slope $m$ , the equation of the line is:

$y-y_o=m(x-x_o)~=>y=mx+y_o-mx_o~=>b=y_o-mx_o\\\\b=-6-4(3)=-18$

4 0

3 years ago

Allan is deriving the quadratic formula, as pictured below. His work is incorrect. In which step did Allan first make an error?

Zina [86]

Answer:

step 5 is the answer

8 0

3 years ago

Calculate the area of the Parallelogram.<br><br><br>I will mark as brainliest, Please help quick!

scZoUnD [109]

Answer:

A = 42 cm²

Step-by-step explanation:

the area (A) of a parallelogram is calculated as

A = bh ( b is the base and h the perpendicular height )

here b = 6 and h = 7 , then

A = 6 × 7 = 42 cm²

3 0

2 years ago

A sound receiving dish used at outdoor sporting events is constructed in the shape of a paraboloid, with its focus 8 inches from

bixtya [17]

Answer:

w≅8.46ft

Step-by-step explanation:

Data

focus=8

vertex=(0,0)

width=?

depth (y)=3ft

parabola equation: $(x-h)^{2}=4p(y-k)$ ; then for V=(0,0), $x^{2} =4py$ , be focus(f)=8in; $x^{2} =4*8*y=32y$ → $y=\frac{x^{2} }{32}$

we have that y=3ft then $3=\frac{x^{2} }{32}$ ; but 1in≅0.083ft so $x^{2} =3*32*0.083=7.968$ → x=±2.82, finally w=3*2.82≅8.46ft

6 0

3 years ago

Math exercise math test​

Math exercise math test