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mars1129 [50]
3 years ago
7

Pls help if you can this is really hard

Mathematics
1 answer:
pogonyaev3 years ago
8 0

Answer:

oki

Step-by-step explanation:

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Jill bikes 2/3 hour at 18 mph and then walks 2/5 hour at 5 mph. How much farther did she bike than walk?
Oksana_A [137]

Answer:

10

Step-by-step explanation:

When the equation says that Jill bikes 2/3 hour at 18 mph, it means that the amount of miles she biked is 2/3 of 18. 18 divided by 3 is 6. 6 times 2 is 12, so she biked 12 miles. If she walks 2/5 hour at 5 mph, then she walked 2 miles because 5 divided by 5 is 1 and 1 times 2 is two. The question is asking how much more she biked than walked, so 12-2=10.

8 0
3 years ago
A hyperbola centered at the origin has verticies at (add or subtract square root of 61,0 and foci at (add or subtract square roo
deff fn [24]

Answer:

\frac{x^2}{61}-\frac{y^2}{37}  =1

Step-by-step explanation:

The standard equation of a hyperbola is given by:

\frac{(x-h)^2}{a^2} -\frac{(y-k)^2}{b^2} =1

where (h, k) is the center, the vertex is at (h ± a, k), the foci is at (h ± c, k) and c² = a² + b²

Since the hyperbola is centered at the origin, hence (h, k) = (0, 0)

The vertices is (h ± a, k) = (±√61, 0). Therefore a = √61

The foci is (h ± c, k) = (±√98, 0). Therefore c = √98

Hence:

c² = a² + b²

(√98)² = (√61)² + b²

98 = 61 + b²

b² = 37

b = √37

Hence the equation of the hyperbola is:

\frac{x^2}{61}-\frac{y^2}{37}  =1

6 0
3 years ago
Determine the validity of the following argument: For students to do well in a discrete mathematics course, it is necessary that
Vinvika [58]

Answer: True

Step-by-step explanation:

Let p= Students who do well in course do not skip class

q= Student who study hard do well in course

So p^q= Student who study hard and who do well in course do not skip class.

If p= true and q=true then p^q= true by discrete maths.

5 0
3 years ago
Which sign makes the statement true?<br> 11<br> 20<br> ? 61%<br> &gt;<br> &lt;<br> Submit<br> ASAP
Tcecarenko [31]
11/20 < 61%

11/20 =.55
61% = .61
.55<.61
3 0
3 years ago
Can someone pleas3 help me with this, were doing algebraic expression I believe.
maxonik [38]

Answer:56w^{7} y^{5}\\

if it doesn't work im sorry

5 0
2 years ago
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