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VLD [36.1K]
2 years ago
13

Rene made a 90 % on her math test. If she answered 20 problems correctly , how many problems were on the test ?

Mathematics
1 answer:
MakcuM [25]2 years ago
8 0

Answer:

Rene made = 90 on her math test

If she answer =20problems correctly

we know,

how many problem were there = ?

there where = 90-20

= 70

There where 70 problems

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Solve the system of equations: 10x + 7y = 99 and y – x = 2.
svetlana [45]
7y + 10x = 99
y - x = 2
y = 7 , x = 5
7 0
3 years ago
Using the figure below find what m<_7 equals. (show work if possible)
miss Akunina [59]

Answer:

68

Step-by-step explanation:

m7 + m8 = Straight line = 180

So, m7 = 180 - 112 = 68

8 0
3 years ago
Which of these non-terminating decimals can be converted into a ratinaol number
madreJ [45]

Answer

A. O.8743874374387438743....

Step by step explanation

Let's take a = O.8743874374387438743....

10a = 8.743874374387438743....

Similiarly,

10000a = 8743.874374387438743....

Since four decimal places are repeating.

Now subtract a from 10000a

10000 a - a = 8743.874374387438743....  - O.8743874374387438743....

9999 a = 8743

a = 8743/9999

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That's it.

Hope you will understand the concept.

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6 0
3 years ago
Is the point (3, 4) a solution to the equation 3y = 2x +6 ? Explain why using evidence from your work
irinina [24]

Answer:

Yes

Step-by-step explanation:

When graphing it you can see that (3, 4) is clearly a solution. The proper equation using slope intercept form is y= 2/3x + 2.

7 0
3 years ago
I need a little extra help with number three
diamong [38]

Answer:

The answer to your question is:

Step-by-step explanation:

Data

f(x) = -2x² + 8x - 2

Process

                -2x² + 8x = y + 2

                -2(x² - 4x + 4) = y + 2 - 8

                -2(x - 2)² = y - 6

                    (x - 2)² = 1/2 (y - 6)

Vertex = (2, 6)

Axis of symmetry =   x = 2

y-intercept

                 f(0) = -2(0)² + 8(0) - 2

                 f(0) = 0 + 0 - 2

                 f(0) = -2

Domain    (-∞, ∞)

Range    (-∞, 6]

See the graph below

6 0
3 years ago
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