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natima [27]
3 years ago
12

If the value of b is 7, then what is the value of the expression -3b2 + 25 = ? A. 122 B. –122 C. 172 D. 17

Mathematics
2 answers:
natali 33 [55]3 years ago
8 0
We first need to substitute in the value of b, which is 7. 

-3(7)^2 + 25 \\ \\ -3 \times 49 + 25 \\ \\ -147 + 25 \\ \\ -122 \\ \\

The final result is, B) -122.
mr_godi [17]3 years ago
5 0
-3 × 39 + 25
-147 + 25 
=
-122

So this means your answer would be: B. -122 


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3 years ago
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Mr Tarun earns dollar $12.50 a day how much would he earn if he works for 6 days​
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Answer:

$75

Step-by-step explanation:

Question:Mr Tarun earns dollar $12.50 a day how much would he earn if he works for 6 days?

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12.50 multiple by 6

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Ans.$75

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7 0
3 years ago
10. How many cubic inches of material do you need to make a solid rubber ball with a diameter of 3 in.? Round your answer to two
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3 0
3 years ago
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Given: QR I PT and ZQPR = ZSTR
Rina8888 [55]

Answer:

\triangle PQR \sim \triangle TSR

Step-by-step explanation:

Given :

QR⊥PT

\angle QPR = \angle STR

To Prove : \triangle PQR \sim \triangle TSR

Solution:

Statements                                            Reasons

QR⊥PT                                                Given

∠QRP and ∠SRT are right angles       Def of perpendicular

∠QPR≅∠STR                                     Given

∠QRP = ∠SRT                                    All right angles are equal

ΔPQR≈ΔTSR                                     AA similarity

Hence  \triangle PQR \sim \triangle TSR

5 0
3 years ago
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