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kakasveta [241]
1 year ago
9

4. Which of the following expressions will have the same value as the expression below? -7-(-5)A. -7+(-5)B. -7-5C. 7+(-5)D. -7+5

Mathematics
1 answer:
Vera_Pavlovna [14]1 year ago
5 0

1) Let's operate this expression -7 -( -5)

-7 -( -5) <em>The minus before the parentheses work as -1 x (-5)</em>

-7 +5

-2

2) Examining each expression

a) -7+(-5) = -7 -5 = -12

b) -7-5= -12

c) 7-5 = 2

d) -7+5 = -2

3) So according to the options, the answer is D

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Solve x2 + 5x = −6. x = 5 and x = 1 x = −5 and x = −1 x = 3 and x = 2 x = −3 and x = −2
fomenos

Answer:

x = −3 and x = −2

Step-by-step explanation:

x^2 + 5x = −6

Add 6 to each side

x^2 + 5x+6 = −6+6

x^2 +5x+6 =0

Factor

What 2 number multiply to 6 and add to 5

3*2 =6

3+2 =5

(x+3)(x+2) =0

Using the zero product property

x+3 =0             x+2 =0

x+3-3=0-3         x+2-2=0-2

x=-3                       x=-2

8 0
3 years ago
Theresa is comparing the graphs of y=2x and y=5x. Which statement is true?
abruzzese [7]

Answer:

Both graphs have a “y-intercept” at (0,0), so i believe the answer would be they don’t have y intercepts

Step-by-step explanation:

7 0
3 years ago
7 times as much as sum of 1/3 and 4/5
Salsk061 [2.6K]
So the formula is
7*(1/3+1/5) = x

First find the common denominator of the fractions.  In this case the common denominator of 3 and 5 is 15 so we must convert them to 15ths.  To do that we divide 15 by the denominator and take that answer and multiply the numerator by it.

So for 1/3 we take 15/3(denominator) = 5 and multiply the numerator (1) by it

5 * 1 = 5 so 1/3 converts to 5/15

Do the same for 1/5 we take 15/5 = 3 and multiply the numerator (4) by it

3*4 = 12 so 4/5 converts to 12/15

Now we add 5/15 and 12/15 = 17/15 so we have our formula now to

7*17/15

We make seven a fraction 7/1 and multiply across 7*17 = 119 and 15 * 1 = 15

We have 119/15 which when we divide and get 7 14/15 as your answer
8 0
3 years ago
Read 2 more answers
I need help With this please
Ber [7]

the answer is b. 30 hope this helps

6 0
3 years ago
Given Q is between J and K, JQ is five times the length of JK and JK=42 find the length of JQ
Alex73 [517]

Answer:

210

Step-by-step explanation:

JQ is 5 times the length of JK

● JQ = 5JK

JK = 42

● JQ = 5 × 42

● JQ = 210

8 0
3 years ago
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