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Leto [7]
3 years ago
11

1. 7(6-(-4)) What is this I don’t know

Mathematics
2 answers:
Makovka662 [10]3 years ago
7 0

Answer:

70

Step-by-step explanation:

1 you take the parenthese off 6 minus -4 which equals 10 bc when you subtract a negative form a positve it adds them together so now you have 10 then you would do 10 multilied by 7 bc the 7 is outside of the parentheses so you divide and you get your answer which is 70

Marina CMI [18]3 years ago
5 0
So you would start with removing the parentheses so 6- - 4 would be 6+4 because the double negative and then that would be 10 so 7 times 10 so your answer is 70
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Suzette ran and biked for a total of 34 mi in 3.5 h. Her average running speed was 6 mph and her average biking speed was 12.5 m
olga nikolaevna [1]

Answer:

From the information given

x is time for which she ran at speed of 6mi/h and

y is time for which she biked at speed of 12.5 mi/h

total time = 3.5 h

total distance = 34 mi

so

6x + 12.5y = 34 and

x + y = 3.5

x = 3.5 - y

6 ( 3.5 - y) + y = 34

6.5y = 13 which gives

y = 2 and this

x = 1.5

so suze ran for 1.5 h and biked for 2 h

CHECK

speed of run X time of run + speed of biking x time of biking must be = total distance covered

6 × 1.5 + 12.5 × 2 = 9 + 25= 34 mi

which is true

8 0
3 years ago
Mr. Roberts sees a rare 1937 penny. The cost of the penny is $210.If he saves $3 each week, will Mr.Roberts have enough money to
Mama L [17]
Well 3 times 52 weeks in a year. Equals 156. He will not have enough money by the end of the year.
3*52=156

3 0
3 years ago
Read 2 more answers
Given 4s+3-8t when s=7 and t=2.
yaroslaw [1]

Answer:

15

Step-by-step explanation:

4x+3-8t\\\\s=7\\\\t=2\\\\4(7)+3-8(2)\\\\28+3-16\\\\28-13\\\\15

3 0
3 years ago
Solve for b.<br><br> −13b=9 plees help
Brilliant_brown [7]
<span>−13b=9
divide both sides by -13
</span><span>−13b/-13 =9/-13
simplify
b = -9/13</span>
5 0
3 years ago
Read 2 more answers
The common ratio of a geometric series is 1/4 and the sum of the first 4 terms is 170.
Illusion [34]

Answer: the first term of the series is 128

Step-by-step explanation:

In a geometric sequence, the consecutive terms differ by a common ratio. The formula for determining the sum of n terms, Sn of a geometric sequence is expressed as

Sn = a(1 - r^n)/(1 - r)

Where

n represents the number of term in the sequence.

a represents the first term in the sequence.

r represents the common ratio.

From the information given,

r = 1/4 = 0.25

n = 4

S4 = 170

Therefore, the expression for the sum of the 4 terms, S4 is

170 = a(1 - 0.25^4)/(1 - 0.25)

170 = a(1 - 0.00390625)/(1 - 0.25)

170 = a(0.99609375)/(0.75)

170 = 1.328125a

a = 170/1.328125

a = 128

5 0
2 years ago
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