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Tatiana [17]
3 years ago
5

Find the discriminant. (Must Show Work) -9m^2+m-7=0

Mathematics
1 answer:
algol [13]3 years ago
4 0

Answer:

-251

Step-by-step explanation:

the discriminant .b^2-4ac

=1-4×(-9)×(-7)

=1-252=-251

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If the shadow of a tree is 14 m long and the shadow of a person who is 1.8 m tall is 4 m long, how tall is the tree?
tigry1 [53]
Ratio and proportion

real:shadow

so the person is 1.8m but the shadow is 4m
so
real:shadow=1.8:4

so
1.8:4=?:14
1.8/4=?/14
times both sides by 14
25.2/4=?
6.3=?

the tree is 6.3 m tall
8 0
3 years ago
Four bells at intervals of 12 minutes, 18 minutes, 20 and 25 minutes. If they toll together at 10 am, when next do they toll tog
Pani-rosa [81]

Answer:

1.00 am

Step-by-step explanation:

Find the LCM of 12,18,20 and 25

=900 min ....change it to hrs =15 hrs

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1000hrs+15hrs

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=1:00 am

4 0
3 years ago
1. Use the points in the diagram to name the figure<br> 1)JS↔️ <br> 2JS➡️<br> 3)JS—<br> 4)JS
lbvjy [14]

Answer:

The correct option is;

\ \underset{JS}{\rightarrow}  \right |

Step-by-step explanation:

The given diagram consists of a a starting point, J having a direction passing through the point S and the line has one arrowhead on the right pointing to infinity, which is the symbol for a ray, JS

The denotation of a ray is made by the name of the ray having an overhead arrow as follows;

ray \ \underset{JS}{\rightarrow}  \right |

3 0
3 years ago
35/square root of 14
m_a_m_a [10]

Answer:

5

Step-by-step explanation:

35 divided by the square root of 14. The square root of 14 is 7. 35 divided by 7 is 5.

8 0
4 years ago
The admissions officer for Clearwater College developed the following estimated regression equation relating the final college G
Strike441 [17]

Answer:

A. Complete the missing entries in this Excel Regression tool output. Enter negative values as negative numbers. ANOVA df SS MS F Significance F Regression 2 .8811 52.4464 Residual 7 .1179 .0168 Total Coefficients Standard Error t Stat P-value Intercept X1 X2.

5 0
4 years ago
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