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creativ13 [48]
3 years ago
11

4. 65% of 80 is what number?

Mathematics
2 answers:
SIZIF [17.4K]3 years ago
5 0

Answer:3.72

Step-by-step explanation:

80x.465 is the equation

antoniya [11.8K]3 years ago
3 0
The number you are looking for is 52
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If two angles of a triangle each measure 45 degrees what is the third angle
Dennis_Churaev [7]
Since you have two angles that measure 45 degrees. Those 2 equal 90 degrees altogether. Since a triangle measures 180 degrees, you take 180-90 because you already have 2 angles and are trying to find the last one. Then this makes the last angle 90 degrees.
6 0
3 years ago
PLS help i rly need help ive posted with no help im rly confused
vesna_86 [32]
Asked and answered elsewhere.
brainly.com/question/8666894
8 0
3 years ago
Try to sketch by hand the curve of intersection of the parabolic cylinder y = x2 and the top half of the ellipsoid x2 + 7y2 + 7z
vovikov84 [41]

Plug y=x^2 into the equation of the ellipsoid:

x^2+7(x^2)^2+7z^2=49

Complete the square:

7x^4+x^2=7\left(x^4+\dfrac{x^2}7+\dfrac1{14^2}-\dfrac1{14^2}\right)=7\left(x^2+\dfrac1{14}\right)^2+\dfrac1{28}

Then the intersection is such that

7\left(x^2+\dfrac1{14}\right)^2+7z^2=\dfrac{1371}{28}

\left(x^2+\dfrac1{14}\right)^2+z^2=\dfrac{1371}{196}

which resembles the equation of a circle, and suggests a parameterization is polar-like coordinates. Let

x(t)^2+\dfrac1{14}=\sqrt{\dfrac{1371}{196}}\cos t\implies x(t)=\pm\sqrt{\sqrt{\dfrac{1371}{196}}\cos t-\dfrac1{14}}

y(t)=x(t)^2=\sqrt{\dfrac{1371}{196}}\cos t-\dfrac1{14}

z=\sqrt{\dfrac{1371}{196}}\sin t

(Attached is a plot of the two surfaces and the intersection; red for the positive root x(t), blue for the negative)

4 0
3 years ago
You're planning to buy a boat, a motor, and some miscellaneous boating equipment. The boat costs $325, the motor costs $225, and
arlik [135]
325 + 225 + 79 = 629
629 - 438 = $191
= A. $191
7 0
3 years ago
PLEASE HELP ASAP
balandron [24]

Answer:

Step-by-step explanation:

X is the variable and x means multiplication symbol.

X + (X x 3 - 1) + (X x 3 - 1) - 4) ≥ 45 is the answer I got.

The answer to that inequality would be

X ≥  7 I think

7 0
3 years ago
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